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Sextant no maker's mark, with bimetallic arc and Vernier scale, with various eyepieces in mahogany case

A fine second half of the 18th century brass-mounted mahogany stick barometer with hygrometer and thermometerGeorge Adams, No.60 Fleet Street, London. Instrument Maker to his MajestyThe arched case with adjustable wheatear hygrometer set above a hinged glazed hood door over a long trunk terminating in a hemispherical cistern cover, the centre of the trunk inset with an imposing mercury thermometer behind a hinged glazed door, the flat bulb measuring 3 inches in length and registering against a scale marked from 25 to 95 degrees, the lower numerals bracketed as 'WINTER', the upper bracketed as 'SUMMER', the signed silvered dial above reading from 28-31 inches and with manual vernier scale, with three weather predictions. 108cms (42 1/2ins) high (1)Footnotes:George Adams was arguably the best known and respected maker of scientific instruments in the latter half of the 18th century. King George III appointed Adams to be his Mathematical Instrument Maker in 1760, and about 20% of the Royal Collection emanated from his Fleet Street workshop. The firm passed to George's son, George Junior and then to Dudley. Perhaps his most iconic instrument is the silver 'New Universal' microscope formed in solid silver now on display at the Science Museum, dating to about the same time as the current lot, 1763.This lot is subject to the following lot symbols: TPTP Lot will be moved to an offsite storage location (Cadogan Tate, Auction House Services, 241 Acton Lane, London NW10 7NP, UK) and will only be available for collection from this location at the date stated in the catalogue. Please note transfer and storage charges will apply to any lots not collected after 14 calendar days from the auction date.For further information on this lot please visit Bonhams.com

A good late 18th century mahogany stick barometer with hygrometer and thermometerBenjamin Martin, LondonThe arched case surmounted by an engraved hygrometer scale read via a fancy blued steel hand, over carved decoration and canted front angles, the long trunk with visible tube framed by a moulded edge terminating in a hemispherical cistern cover, the signed silvered dial mounted with a mercury thermometer and manual vernier reading against a 27 to 31 inch scale, with seven weather predictions. 97cms (38ins) high (1)Footnotes:Benjamin Martin described this type of barometer as a 'Triple Weather Glass' or 'Aerometrum Magnum'. Perhaps it's finest attribute is the improved hygrometer which works by means of an extended gut line mounted at the rear of the case, one end is fixed and the other is held under tension via a spring loaded rack and pinion set-up. Martin (1704-1782) was a skilled scientific instrument maker, after establishing a school in Chichester during his late twenties, from 1738 onwards he went on to present lectures and demonstrations on experimental philosophy to audiences in Reading, Bristol, Bath and London. From 1756 he returned to London where he worked as an optician and made scientific instruments and globes. He was also an author covering topics such as natural philosophy, theology, mathematics, language and geography. On 14th January 1782, Joshua Lover Martin applied for a patent which was to produce a revolution in manufactuing: it was for the process of tude-drawing. Unfortunately by the time the patent was granted on 28th March, his father Benjamin, whose invention it was, had died - bankrupt.This lot is subject to the following lot symbols: TPTP Lot will be moved to an offsite storage location (Cadogan Tate, Auction House Services, 241 Acton Lane, London NW10 7NP, UK) and will only be available for collection from this location at the date stated in the catalogue. Please note transfer and storage charges will apply to any lots not collected after 14 calendar days from the auction date.For further information on this lot please visit Bonhams.com

Late Victorian carved walnut stick barometer, anonymous, the white ceramic scale printed for 10am Yesterday and 10am To Day with Remarks, flanking partially exposed main tube and twin verniers, the moulded figured trunk with ogee-arched carved flowerhead decorated pediment and carved wings over mercury thermometer and carved cistern cover, 102cm high Condition: Missing one wooden Vernier adjusting knob, otherwise sound - **General condition consistent with age

A LATE 19TH CENTURY BRASS SPECTROMETER by Townson and Mercer with 12 inch telescopes, the bed plate with silvered scale and vernier, all within a fitted mahogany box with carrying handle to the top, the box 36cm high without the handle Condition: minor marks and scratches to the lacquer due to age and use, the prism in a separate box, the mahogany case with minor marks, dents and scratches and slight splits, particularly to the front and back

A Troughton pillar-frame sextant, English, circa 1800,signed Troughton London, with -5-0-145 scale and vernier with magnifier, two sets of coloured filters and turned wood handle, lacking telescope, 10in (25.5cm) radius For further information on this lot please visit Bonhams.com

A FINE AND RARE LARGE TUBE SCIENTIFIC BAROMETER, ATTRIBUTED TO TROUGHTON & SIMMS, LONDON, CIRCA 1850 the ¾in. curved glass tube with U-bend, largely encased with lacquered brass and with cork stopper, mounted on hinged wooden display board with inset scales with vernier and magnifier with rack-and-pinion adjustment, Fahrenheit thermometer with silvered scale – 42½in. (108cm.) highFootnote: The wide tube on this instrument allows for precise measurements to be recorded as the mercury will even to a flat surface.Condition report: Good overall condition. Mercury drained (for reasons of weight) but available. Both tubes later replacement.

A 7½IN. RADIUS BRASS OVAL PATTERN SEXTANT BY J.F. WILLIAMS, BRISTOL, CIRCA 1860 with oxidised brass frame, polished brass arc signed as per title and with inset polished silver scale divided to 140°, vernier with clamp and magnifier with fine screw adjustment, seven shades, two mirrors, wooden handle, contained in fitted keystone box with retailer's label for Edward Langford, Bristol, pasted inside lid -- 10in. (25.5cm.) wide

Ø A 7½IN. RADIUS BRASS TULIP PATTERN SEXTANT, CIRCA 1870 unsigned, the oxidised brass frame with inset ivory scale divided to 130°, vernier with clamp and magnifier, braced index arm, seven shades, two mirrors and wooden handle, contained in fitted baize-lined keystone box with accessories -- 10in. (25.5cm.) wideCondition report: Good overall condition for age.

A 6½IN. RADIUS TRIANGLE PATTERN BRASS SEXTANT BY G. WHITBREAD, LONDON, CIRCA 1890 signed on the arc as per title and numbered 2009, silvered scale divided to 150°, vernier with fine screw adjustment and magnifier, braced index arm, seven shades and two mirrors, wooden handle, contained in fitted box with key, the fob stamped Whitbread and trade label inside lid for Christy & Wilson, Glasgow -- 9¼in. (23.5cm.) wideCondition report: Original oxidised finish largely missing.

A RARE AND HISTORICALLY INTERESTING 4IN. RADIUS POCKET SURVEYING SEXTANT BY JESSE RAMSDEN, LONDON, CIRCA 1794 signed on the T-bar Ramsden London, the arc with chamfered scale directly divided to 130°, vernier with clamp and fine screw adjustment and swivel magnifier, the index arm inscribed Lieut. Col. Twiss, threaded sighting tube arbour, two shades, index mirrors and horizon mirror with adjusting arm and switch, contained within original fitted case of issue -- 6in. (15cm.) wideFootnote: General William Twiss (1745-1827) was a military engineer and integral not only to Britain's defences at the height of the Napoleonic threat, but also to several key British possessions overseas. Attached to the Ordinance Office of the Tower of London in 1760, in 1762 he was sent to Gibraltar as overseer of the King's works, a role which lasted until 1771 when he returned to bolster the defences of Portsmouth Dockyard. In June 1776 Twiss arrived in Canada with General Sir John Burgoyne's army and, having been appointed aide-de-camp to General William Phillips, took part in the operations to clear the insurgent Americans from Quebec province. Sir Guy Carleton, commander-in-chief in Quebec, then made him controller of works for the construction of a fleet to wrest possession of Lake Champlain from the Americans, an objective accomplished with victory at the Battle of Valcour Island in October 1776. The following year, when Burgoyne opened his campaign to enter the Hudson valley, Twiss was appointed his commanding engineer, planning the siegeworks that led the Americans to abandon Fort Ticonderoga on 5 July. Captured shortly after, he was exchanged and sent back to Canada to strengthen Canada's defences. He chose the site of Fort Haldimand on Lake Ontario (1778) and supervised the construction of a temporary citadel at Quebec, work on which began in 1779. Twiss also made important improvements to the navigation of the St Lawrence River, particularly by his fortified canal at Côteau-du-Lac. On 18 December 1778 he was promoted captain-lieutenant and in 1781 he became Canada's commanding engineer. Returning to England in 1783, he was appointed Secretary to the Board and responsible for the defences of Portsmouth and Plymouth DY's, and in 1794, having been promoted lieutenant-colonel (when he doubtless acquired this high-quality sextant), he was also appointed lieutenant-governor of the Royal Military Academy at Woolwich. During the 1790s the threat of French invasion kept Twiss busy on the south coast, and he oversaw the strengthening of the eastern defences of Dover Castle with four new bastions. He subsequently made tours of the Channel Islands (1800) and Ireland (1802) in order to report upon their defences. During the heightened danger of French invasion in 1803 he again looked to the defences of Dover and, on his recommendation, the western heights overlooking the town were fortified. He also sank the grand shaft to connect the barracks on the western heights with the town below. Appointed brigadier-general on 11 February 1804, he was instrumental in helping achieve — despite the dilatoriness of the Ordnance Board — the construction between 1805 and 1808 of a chain of seventy-three Martello towers to guard landing points in Kent and Sussex. Twiss had been promoted major-general on 30 October 1805, and on 24 June 1809, he became colonel-commandant of the corps of Royal Engineers. He retired to Yorkshire in 1810 but was promoted to full general in 1825. The Museum of Royal Engineers in Gillingham has his pocket theodolite, also by Ramsden, Object No. 6303.5.3.Condition report: Fine overall condition retaining much original lacquer. Scale dulled, rubbing to vertical T-section. Front rim of lid missing.

Ø A 9¼IN. RADIUS VERNIER OCTANT, CIRCA 1830 unsigned, inset ivory scale divided between 100° and 5°, braced index arm, telescope mount with pinhole sight, seven shades, two mirrors, contained in keystone box with two sighting tubes and retailer's label inside for Heath, Devonport -- 12in. (30.5cm.) high; together with a 6½in. radius curved bar brass sextant by John Bruce & Sons, Liverpool, contained in fitted box with sighting tubes; and a single draw 1½in. telescope by W. Ottway & Co. Ltd, Ealing, dated 1939, with leather-covered tube (3)Condition report: Octant: Old wear, handle detached.

A George III mahogany bow-front barometerBy Adie & Son, EdinburghThe 8in silvered scale with vernier above the trunk with inset thermometer99cm high Condition Report The barometer is in good working condition. The pediment block is a slightly different colour than the stem and there is a new brass hook for hanging. Both silvered scales are tarnished. The bow front fillet below the main dial is a different colour, more orange as is the base fillet. New brass screwed strap across back of cistern cover. Marks and scratches across trunk consistent with age.

A black lacquered and brass mounted marine mercury stick barometer, by F Darton & Co Ltd, London, with cylindrical silvered scale with Vernier adjustable slide, engraved brass plate and gimbal mount, height 92cm.

SCOTTISH MAHOGANY STICK BAROMETER, ADIE, EDINBURGH EARLY 19TH CENTURY the swan neck pediment with ivory roundels above a silvered Vernier scale signed A. Adie/ Edinburgh, above a plain shaft terminating in a semispherical cistern cover(95cm high)Footnote: Note: Please be aware that this lot contains material which may be subject to import/export restrictions, especially outside the EU, due to CITES regulations. Please note it is the buyer's sole responsibility to obtain any relevant export or import licence. For more information visit http://www.defra.gov.uk/ahvla-en/imports-exports/cites/

A late 20th Century French engineers protractor named Simpa by J Lejard Paris, white plastic arc with instructions, boxed, also a large map rule by Nato visual planning Corp, boxed, a US hand held protractor by Union Instr. Corp and a Vernier scale No 14387, all cased. (4)

A George III mahogany stick barometer, broken arched pediment above the silvered dial, signed 'Bap. Roncheti & Co. Fecit', with vernier scale, the trunk with silvered thermometer scale, damages together with an Edwardian inlaid mahogany barometer (2) Note: Baptist Roncheti was a Manchester maker

Two early 19th century mahogany stick barometersthe first signed Abraham, Bath, the second Hoppe Manufacture, Little Minories London the first with rounded arched top over an open tube terminating in a turned urn shaped cistern cover, the signed silvered dial with seven weather predictions and manual vernier reading against a 27-31' scale,the second signed on the silvered scale with scale and vernier, the trunk mounted with thermometer and demi urn shaped cistern cover 97cms high and 98cm high (2)Footnotes:Jacob Abraham advertised himself as an Optician working from St Andrew's Terrace, Bath between 1809 and 1811, he then spent 29 years in Cheltenham before returning to Bath 1830 to 1842.This lot is subject to the following lot symbols: TPTP Lots denoted with a 'TP' will be moved to an offsite storage location (Cadogan Tate, Auction House Services, 241 Acton Lane, London NW10 7NP, UK) and will only be available for collection from this location at the date stated in the catalogue. Please note transfer and storage charges will apply to any lots not collected after 14 calendar days from the auction date.For further information on this lot please visit Bonhams.com

λ A RARE MAHOGANY AND BRASS BALLOONING OR MOUNTAIN STICK BAROMETER BY THOMAS JONES, EARLY 19TH CENTURY of cylindrical shape, the screw-off cap top revealing a suspension ring, above a sliding cover revealing a silvered register with a manually operated vernier scale, with an ivory thermometer, inscribed 'Thos Jones Charing Cross', above an ivory registered 'Tempe of the mercury, correction of the expann of mercury & mean dilation of glass, heights of the mercurial column in inches, neutral point 30.340, capacity 1 / 56, temperature 52 degrees', in a leather travelling case 94cm high

A fine and rare late 18th century mahogany stick barometer with one-inch diameter glass tubeJohn Russell, FalkirkThe flat top with moulded cornice over a hinged glazed door, the waisted trunk terminating in an oval cistern cover and set to the front with a well carved reeded column to protect the one-inch diameter glass tube, with brass Corinthian capital and base (with traces of original lacquer), terminating in a brass capital and base, the arched silvered one-piece dial (12ins x 5.5ins) surmounted by a hygrometer dial over twin scales, to the left a mercury Centigrade thermometer with oval bulb and to the right with 27-31 inch scale with eight weather predictions, with manual sickle-shaped vernier. 110m (43ins) high (1)Footnotes:John Russell, born c.1745-1817, was a highly respected clock and watch maker who in his later life rose to become Watchmaker to his Royal Highness the Prince Regent. A similar example also by Russell of Falkirk was sold in these salerooms on 14 July 2010, lot 48.For further information on this lot please visit Bonhams.com

A GEORGE III MAHOGANY CASED STICK BAROMETER by Dollond of London, silvered dial with vernier scale and with turned reservoir, 13cm wide x 98cm high overall

An early 19th century stick barometer signed twice J.S Marratt, 63 King William Street, London Bridge, the bow-fronted moulded case with ivory twin scale marked for 10am yesterday and 10am today from 27-31" with vernier scales, the shaft with ivory mercury thermometer, the base with half urn cistern cover, 142.5cm high.

A Longines stainless steel keyless wind open face 1/10th split-second chronograph stop watch, made for the 1968 Mexico Olympic Games, manufactured circa 1966, the silvered dial with black bezel seconds markers and yellow split-second markers, black pointed baton hands, the centre orange chronograph hand with Vernier scale, engraved to the backplate 12303546, further numbered 7411-2 and 8350, the dial 60mmCondition report: No box or papers.Dial excellent.Case overall very good, some expected light surface scratches to back cover.Not currently running.We believe that the main spring is broken and requires repair.

SCOTTISH GEORGE III MAHOGANY STICK BAROMETER, BY BALTHAZAR KNIE, EDINBURGH LATE 18TH/ EARLY 19TH CENTURY the signed silvered dial inscribed with mercury Fahrenheit thermometer and main scale with manual vernier, inscribed KNIE EDIN, the long trunk of typical form with inlaid edge and visible tube, terminating in a hemispherical cistern cover (98.5cm high) Footnote: Provenance: The Earls of Crawford and Balcarres, Balcarres House, Fife, Scotland

SCOTTISH GEORGE III MAHOGANY STICK BAROMETER, BY ANGELO LOVI, EDINBURGH LATE 18TH/ EARLY 19TH CENTURY the signed silvered register plate with a mercury thermometer and main scale with manual vernier, inscribed A. LOVI FECIT, the long trunk with moulded edge and visible tube, terminating in an inlaid square cistern cover (91.5cm high) Footnote: Provenance: The Earls of Crawford and Balcarres, Balcarres House, Fife, Scotland

19th century rosewood stick barometer, with ivory mounted register, thermometer, and adjustable vernier scale,with brass cistern and hanging loop, by W. Rodgerson, 8 St James St, Liverpool. Approx 94cms high

A George III mahogany mercury stick barometer, Charles Aiano, London, circa 1810, with open triangular pediment above line-edged glazed door enclosing rectangular silvered Vernier scale calibrated in barometric inches and with the usual observations to the right opposing Fahrenheit scale spirit thermometer to the left, the upper margin signed C. Aianno, the caddy moulded trunk with visible tube flanked by figured mahogany veneers within chevron line border over rounded base with hemispherical cistern cover and level adjustment screw to underside, 97cm (38ins approx.) high. Charles Aiano is recorded in Banfield, Edwin BAROMETER MAKERS AND RETAILERS 1660-1900 as working in London circa 1790-1820; he is believed to have moved to Canterbury in around 1825.Condition Report: Dreweatts cannot guarantee the mechanism as working, we recommend getting it cleaned and overhauled by a professional restorer, There is mercury in the cistern and showing in the tube, The hinge holding the door closed at time of report, the internal slide is working and adjustable, Some old splits and cracks to the timber, this is mainly near the 'throat'Please refer to additional image for visual reference to condition Condition Report Disclaimer

A 12inch radius vernier octant by Spencer Brown & Co, London: the wooden frame inset scale calibrated to 105° and stamped 'SBR' to centre, makers plate stamped as per title, lacquered-brass index arm, pinhole sights, brass mirrors and shades, 33.3cm high.

A Rare Stick Barometer by George Adams _ The silvered brass scale calibrated from 27" to 31" with weather indications and a sliding vernier incorporating a brass pointer and a small brass knob for adjustment. The engraved inscription to the arch reads; Made by G. Adams, No 60 Fleet Street, London. Instrument Maker to his Majesty. The fine mahogany case (c. 103cm) with exposed mercury tube, surrounded with herringbone mahogany veneer, well turned mahogany cistern cover and architectural top with central brass finial, c.1765. Note: George Adams was an outstanding barometer maker, optician and instrument maker. He was apprenticed to James Parker in 1724 and Thomas Heath in 1726 who was also a maker of some note. He was instrument maker to His Majesty's Office of Ordnance between 1746 and 1748. He became instrument Maker to the Prince of Wales in the 1750s and then Instrument Maker to his Majesty King George III in 1760. George Adams died in 1773 leaving two sons by the names of George and Dudley to carry on the business into the 19th century.Collect in person or specialist courier  

A late 19th century Fortin pattern marine barometer, the silvered register reading in inches and millimetres, rack and pinion vernier scale and base well adjustment, mercury thermometer, glazed mahogany case, 123cm high overall, c.1890

A chequer strung mahogany stick barometersigned C M the broken architectural pediment centred by a brass urn finial over a hinged glazed door and visible tube to the long trunk terminating in a turned cistern cover, inlaid to the borders, the silvered scales with alcohol thermometer and signed 'C M FECIT', with manual vernier reading against a 27-31' scale engraved with seven weather predictions, 94cms highThis lot is subject to the following lot symbols: TPTP Lots denoted with a 'TP' will be moved to an offsite storage location (Cadogan Tate, Auction House Services, 241 Acton Lane, London NW10 7NP, UK) and will only be available for collection from this location at the date stated in the catalogue. Please note transfer and storage charges will apply to any lots not collected after 14 calendar days from the auction date.For further information on this lot please visit Bonhams.com

An early 19th century mahogany stick barometersigned on the silvered scale Hoppe Manufacture Little Minories London with scale and vernier, the trunk mounted with thermometer and demi urn shaped cistern cover, 98cm high This lot is subject to the following lot symbols: TPTP Lots denoted with a 'TP' will be moved to an offsite storage location (Cadogan Tate, Auction House Services, 241 Acton Lane, London NW10 7NP, UK) and will only be available for collection from this location at the date stated in the catalogue. Please note transfer and storage charges will apply to any lots not collected after 14 calendar days from the auction date.For further information on this lot please visit Bonhams.com

An early 19th century feather banded mahogany stick barometersigned J.Wisker, Yorkthe broken architectural pediment centred by a turned brass ball finial over an opening glazed hood door and visible tube terminating in a turned hemispherical cistern cover, the signed silvered scale with manual vernier reading against seven weather predictions, 97cms highFootnotes:John Wisker worked from Spurriergate in York from 1804-1822. His widow Elizabeth carried on the family business until 1827.This lot is subject to the following lot symbols: TPTP Lots denoted with a 'TP' will be moved to an offsite storage location (Cadogan Tate, Auction House Services, 241 Acton Lane, London NW10 7NP, UK) and will only be available for collection from this location at the date stated in the catalogue. Please note transfer and storage charges will apply to any lots not collected after 14 calendar days from the auction date.For further information on this lot please visit Bonhams.com

An 18th Century Mahogany Cased Compass and an Ebonised Desk Thermometer, the compass by Thomas Lee, Sail-Maker & Ship-Chandler, High Street, Hull, with printed paper scale and engraved brass vernier, contained in plain case, 5.75ins square, the desk thermometer by H. Hughes & Son, 59 Fenchurch Street, London, with mercury thermometer, on moulded square ebonised plinth, 11.75ins high

Scales and rules, comprising a large slide rule in mahogany rectangular box, paper label for 'D. Thornton Ltd., Paragon Works, Manchester', no vernier, a Faber-Castell slide rule in original green card box, 30cm, another vernier cracked, 27.5cm, a chart/scale for Compressive Strengths In Concrete 'The Twelvetrees Calculator - Patent No. 17334 AD 1908', one mahogany side trim lacking, 15.6cm sq., a 'Hydrographic Office Rule Star Finder, March 1942' in worn leatherette circular case, 24cm dia., and a pilots knee or arm chart/note board dated 1944, 25.5cm. (6)

Sextant 'The Hezzanith Observatory Works, London' with Vernier scale, in mahogany case with maker's label dated 13/3/18 and 'Sextant No.780, 6 1/2'' radius'Generally tarnished and surface corrosion

Y A Scottish Regency satinwood mercury stick barometer, J. and J. Gardner, Glasgow, circa 1815, with visible tube and inset ivory Vernier scale calibrated in barometric inches and with the usual observations signed J. & J. Gardner, GLASGOW to lower left applied to a fiddle-back satinwood veneered trunk incorporating pointed pediment and fine strung crossbanded border over conforming hinged-front rectangular cistern cover, 99cm (39ins) high. J. and J. Gardner of Bell Street, Glasgow are recorded in Banfield, Edwin BAROMETER MAKERS & RETAILERS 1660-1900 as a partnership between John Gardner and his son of the same name from 1799 until the latters death in 1818. 

A 7½IN. VERNIER BRIDGE-FRAME SEXTANT BY BERGE, LATE RAMSDEN, LONDON, CIRCA 1800 with oxidised brass lattice frame, polished arc signed as per title, inset silvered scale divided to 150°, vernier with magnifier on threaded bridge, two mirrors, seven shades, contained within fitted box with three sighting tubes ( box later ) -- 12½in. (32cm.) wideCondition report: Good overall condition with typical marks commensurate with age. Mirrors probably later replacements. Box is later but of period style.

AN 8IN. RADIUS DOUBLE-FRAMED VERNIER SEXTANT BY GILBERT, LONDON, CIRCA 1820 with oxidised brass frame, brass arc signed as per title, silvered scale divided to 145°, braced index arm with vernier and magnifier, shades, mirrors, wooden handle, contained within keystone box with three sighting tubes -- 14in. (35.5cm.) wideCondition report: scale tarnished, otherwise apparently good original condition. box missing corner on right hand side of lid.

A FINE 5½in. RADIUS LADDER FRAME SEXTANT BY E. SMITH, LONDON, CIRCA 1875 with oxidised brass lattice frame, polished brass arc signed and inscribed E. Smith Maker to the Royal College Greenwich, 11 American Sqr, London, with silvered scale divided to 150°, lacquered brass vernier with magnifier, seven shades, two mirrors and wooden handle, inscribed on the index arm C. Taylor, RN , contained within fitted box with accessories with owner's plate inscribed C. Taylor, RN -- 9 x 9in. (23 x 23cm.)Condition report: Instrument in excellent, possibly unused condition with sharp edges, unworn finish, largely intact lacquer and bright mirrors.

Ø A 15½IN. RADIUS VERNIER OCTANT BY GILBERT & WRIGHT, LONDON, CIRCA 1790 the mahogany T-frame with inset ivory scale divided to 90°, plain lacquered brass vernier, signed as per title, double pinhole sights, interchangeable shades, mirrors, pencil, note plate and feet -- 18in. (45.5cm.) high overallCondition report: fine overall condition, modest signs of wear commensurate with age.

A GUNNER'S LEVEL BY J.H. STEWARD, LONDON, CIRCA 1890 constructed in oxidised brass, signed on the silvered arc as per title, tangent screw with vernier scale, telescope sighting, cross-hairs and mirror, contained within fitted plush lined box of issue -- 4½in. (11.5cm.) wideCondition report: Fine overall condition, box a little faded.

A FINE COUNTER-WEIGHTED EQUATORIAL MOUNT BY S. & B. SOLOMONS, LONDON, CIRCA 1840 constructed in lacquered brass and signed on the bed-plate as per title, radial arc with vernier scale, horizontal and vertical 360 scales, telescope plate with 5½in. lug holes, approx 15 x 15in. (38 x 38cm.); 15kg

A CIRCULAR PROTRACTOR BY TROUGHTON & SIMMS, LONDON, CIRCA 1840 constructed in lacquered brass with inset silvered scale, signed on the clamping arm as per title, opposing vernier arms with folding extensions, contained in plush-lined box of issue -- 8in (20.5cm.) wideCondition report: Fine overall condition

A FINE EXTENDED ARM PROTRACTOR BY J.D. POTTER, LONDON, CIRCA 1830 constructed in oxidised brass with lacquered brass arc with inset silvered scale, signed on the cross bar, Potter, Poultry, London , index arm with vernier and clamp, arm extension, contained in fitted box of issue -- 10¼ (26cm.) wide; together with horn magnifying glass (2)

A FINE 6IN. RADIUS GUNNER'S LEVEL BY NEGRETTI & ZAMBRA, LONDON, CIRCA 1890 heavily constructed in lacquered brass and signed as per title, the arc divided to 90°, the index arm with bubble level and vernier scale, contained within box of issue -- 10 x 9in. (25.5 x 23cm.)Condition report: Fine overall condition.

A 1IN. THEODOLITE BY ADIE & WEDDERBURN, EDINBURGH, CIRCA 1890 the 10in. telescope with bubble level and radial arc with vernier scales and magnifiers, mounted to oxidised brass A-frame stand, the bedplate with 3in. silvered compass signed as per title, silvered scale with magnifiers and clamp, contained within fitted box with accessories, service label for Cooke, Troughton & Simms dated 1947 inside lid, leather strap -- 7½ x 13in. (19 x 33cm.)Condition report: Good overall condition.

A Large & Impressive Ross No.1 'Improved' Compound Binocular Microscope Outfit, English, c.1880, signed to the rear of the foot ‘ROSS, LONDON ’, Standing on a massive cast brass shaped base with tall uprights supporting the microscope body on large trunnions with friction break, large plano-concave mirror in articulated arm on sliding collar, fully mechanical substage with screw X-Y control, engraved scale with vernier, crown and pinion gear, with rack and pinion focusing, large mechanical stage with engraved scale around the edge, crown and pinion gear, X-Y control via rack and screw, large rectangular bar with rackwork to the rear, bar limb incorporating fine focusing mechanism, Wenham prism in pull out brass drawer, binocular eyepieces engraved at the base ‘WENHAMS BINOCULAR By Ross, London’ with inter-ocular rackwork to the top, in a large glazed mahogany case with the following accessories;A 1 1/2in objective in a can engraved ‘Ross London’; 3 unmarked objectives; A triple nosepiece engraved ‘Ross London'; A pair of low power eyepieces engraved ‘A’; A pair of medium power eyepieces engraved ‘B’; a pair of eyepieces engraved ‘C Kelners Orthoscopic, Ross London’; an eyepiece engraved ‘C’; a Stage mounted side reflector..a Lieberkühn; an analyser and other items.

Y A Victorian rosewood mercury marine stick barometerCasella, London, circa 1860With suspension ring to top over arched bevel-glazed canted double ivory Vernier scales calibrated in barometric inches and with the usual observations, the upper margin signed Casella, MAKER TO THE ADMIRALTY, LONDON and the arch inscribed James Furnell, the trunk with ivory button keys for the Vernier setting squares above applied arch-glazed mercury FAHRENHEIT and REAUMUR scale thermometer, the base with stepped moulded brass cylindrical enclosed cistern (lacking gimbals), 97cm (38ins) high. The firm of Casella is recorded in Banfield, Edwin BAROMETER MAKERS AND RETAILERS 1660-1900 as being established by Louis Casella in 1838 when he went into partnership with his father-in-law Caesar Tagliabue initially trading as Tagliabue & Casella from 23 Hatton Garden, London. His successor, Louis Pascal Casella worked from 1858 and expanded the business resulting in Casella becoming one of the largest makers of barometers and other instruments in England who were still trading well into the 20th century. The name 'James Furnell' inscribed above the maker's signature is probably that of the first owner of the barometer.Condition Report: Barometer contains mercury however the contents appear not to respond to tilting hence there is either a substantial air lock or a problem with the cistern (although there is no evidence of leakage). The scales are in good condition with both Vernier slide adjustments working. The thermometer is in good condition with only minor discolouration to the scale, the lower rail of the moulded surround is missing a small length of moulding. The case is generally in good original unrestored condition as a consequence the cistern casing is tarnished/discoloured in appearance. As catalogued the barometer does not have its gimbal mounts. Condition Report Disclaimer

A George III mahogany mercury stick barometerPedraglio, London, circa 1810With open triangular pediment above line-edged glazed door enclosing rectangular silvered Vernier scale calibrated in barometric inches and with the usual observations to the right opposing Fahrenheit scale spirit thermometer to the left, the upper margin signed Pedraglio Fecit, the moulded-edge trunk with visible tube flanked by figured mahogany veneers within line border over rounded base with hemispherical cistern cover inlaid with a concentric chevron parquetry band, 95cm (37.5ins) high.An M. Pedraglio is recorded in Banfield, Edwin BAROMETER MAKERS AND RETAILERS 1660-1900 as working in London circa 1810-30.Condition Report: Instrument is filled with mercury and providing reasonable reading with no apparent airlocks. The thermometer is intact and operational. Silvering to the scale has very light rubbing/discolouration to Vernier slide otherwise is in fine condition. Case is in good condition but has fairly glassy finish which has light but noticeable surface scuffs to the shellac in places.  Condition Report Disclaimer

Y A fine Regency mahogany bowfronted cistern tube mercury stick barometer Dollond, London, early 19th century With swan-neck pediment and cavetto cornice above bow-glazed silvered vernier scale calibrated in barometric inches and with the usual observations beneath signature Dollond, LONDON to upper margin, the bowed trunk with bone vernier adjustment key to throat and ebony line inlaid edges, the shaped base with ebonised half vase turned cistern cover flanked by canted angles decorated with ebony line infill, the cavetto moulded underside with level adjustment square, 100cm high excluding finial.  Peter Dollond is recorded in Banfield, Edwin BAROMETER MAKERS AND RETAILERS 1680-1860 as born 1730 and died 1820. He was the son of John Dollond, a Huguenot silk weaver and started business as an optician in 1750. He was joined by his father in 1752 until his death in 1761, and then by his brother, John, until his death in 1804. The family businesss was continued by Peter Dollond's nephew, George Huggins, who changed his surname to Dollond. George Dollond became instrument maker to William IV and Queen Victoria, exhibited at the Great Exhibition in 1851 and died 1856. Condition Report: Tube is filled with mercury and will rise almost all the way to the top of then tube when tilted suggesting that there is only a very small amount of air in the system. The scales are in fine condition and the Vernier slide mechanism is operational. The case is fairly heavily faded but otherwise is free from significant faults. The level adjustment screw to the underside is missing around three-quarters of it ivory disc.Condition Report Disclaimer

A Regency mahogany mercury stick barometerWilliam Harris and Company, London, early 19th centuryWith arched glazed door enclosing silvered Vernier scale calibrated in barometric inches and with the usual observations to the right opposing Fahrenheit scale mercury thermometer to the left, the upper right signed W. Harris & Co., 50 Holborn, LONDON, the moulded-edge trunk with visible tube flanked by mahogany veneers with grain set at forty-five degree angles over rounded base with hemispherical cistern cover with moulded band to waist and level adjustment screw to underside, 97cm (38ins) high. Many makers with the surname Harris have worked in the London instrument trade since the middle of the 17th century, however this branch of the family can be traced back to Richard Harris who is recorded in Clifton, Gloria Directory of British Scientific Instrument Makers 1550-1851 as working from several addresses in London circa 1710-1810. His son, William, was apprenticed to the clockmaker Joseph Robinson and gained his freedom of the Clockmakers Company in 1796. William set up business first at 47 High Holborn, London in 1805 before moving to a couple of doors down to number 50 in 1815. The business became William Harris & Company in around 1813 before being renamed William Harris & Son in 1841 when William Harris is believed to have taken in his son, Richard Joshua, into partnership. The business is recorded working from 50 High Holborn until around 1855. 

Y A Victorian rosewood mercury stick barometerG. Braham, Bath, circa 1850The arch-glazed canted double ivory Vernier scales calibrated in barometric inches and with the usual observations, the lower margins annotated 10 A.M YESTERDAY and 10 A.M. TODAY and the arch signed G. BRAHAM, Bath, the trunk with ivory button keys for the Vernier setting squares above applied arch-glazed mercury FAHRENHEIT and REAUMUR scale thermometer, the base of circular outline applied with mounded cistern cover and with level adjustment square to underside, 93cm (36.25ins) high. A G. Braham of Bath appears not to be recorded however John Braham is listed in Banfield, Edwin BAROMETER MAKERS AND RETAILERS 1660-1900 as working from several addresses in Bristol, Bath, Torquay and Cheltenham circa 1830-56 including 8 Pulteney Bridge, Bath in 1833 and 5 York Buildings in 1837.Condition Report: Instrument is filled with mercury and providing reasonable reading. The ivory scale has slight mellowing/greying but otherwise is in fine condition; both Verniers are operational. Thermometer scale has similar greying but otherwise thermometer is in fine condition. Case is in fine condition with no faults worth noting other than some very light crazing to the polish in places. Condition Report Disclaimer

A 19th century brass and black painted vernier microscope, engraved brass scale with rack-and-pinion travel, sliding focus, fully articulated, 35cm high, c.1890

A late 19th century Fortin pattern marine barometer, the silvered register reading in inches and millimetres, rack and pinion vernier scale and base well adjustment, mercury thermometer, glazed mahogany case, 123cm high overall, c.1890

The 'Binden Blood Stoney' Powell & Lealand No.1 Binocular Microscope, English, dated 1875, signed in script to the top of the bar-limb ‘POWELL & LEALAND, 170 Euston Road, London’, and further signed in fine script to the stage 'TELFORD PREMIUM 1874, Awarded By THE INSTITUTE OF CIVIL ENGINEERS TO Bindon Blood Stoney MA. M. Inst C.E.', of standard No.1 construction, standing on a massive lacquered tripod base with rectangular feet each with cork pads, trunnions to the top supporting the body, with large plano-concave mirror to the base as typically supported on one side at the end of an articulated arm on a sliding collar, above which is the fully mechanical sub-stage with X & Y control via screw and rotation controlled through a crown and gear, with focusing via rack and pinion to the rear, with full circuit stage, silver circular scale and vernier, rotation controlled via an inverted crown and gear mechanism that can be disengaged for quick movement, with large Turrel-type mechanical stage with X-Y control, main course focus to rear of body, bar-limb incorporating fine focus lever mechanism, nose piece with prism blanking plate, limb with threaded boss to accept binocular or monocular tubes, the microscope comes with the following accessories in a fitted mahogany case:  A 4in objective signed ‘Powell & Lealand’ & can. A 3in objective & can. A 2in objective & can. A 1in objective & can.A 1/2in objective signed ‘Powell & Lealand’ & can. A 1/4in objective signed ‘Powell & Lealand’ & can. A 1/8in objective signed & can. A 1/8 immersion end cap. A 1/12in objective signed ‘Powell & Lealand’ & can. four Leiberkuhns. A pair of low power binocular eyepieces. A Pair of medium power binocular eyepieces.A medium power micrometer eyepiece. A high power eyepiece. A high power eyepiece. A pair of eyepiece collars.A substage spot lens. A substage polariser.A substage Wenham-type parabolic condenser. A substage achromatic condenser engraved ‘Powell & Lealand’. A substage set of selenite disks. A substage dark well holder and set of three darkwells. A micrometer slide. A Livebox. Stage forceps. A set of brass forceps. A side reflector on an articulated arm. A bulls-eye condenser on an articulated arm. A leather case with a binocular prism engraved ‘Powell & Lealand N.81 PATENT’. A leather case with a binocular prism engraved ‘For Low Powers & Opaque Objects’. A steel adjustment bar.  Along with two Short body tubes and a large table bulls-eye condenser in the main cabinet. Bindon Blood Stoney (1828–1909) was a civil engineer, born at Oakley Park. King's Co., Ireland, on 13 June 1828. The Institution of Civil Engineers awarded him, in 1874, a Telford medal and premium of £100.00 for a paper on his work on the Dublin harbour northern quays. The work included extending the northern quays of the docks to the east, and he began works on the Alexandra basin. In the construction of the northern quays he employed concrete monoliths of the then unprecedented weight of 350 tons, and designed the appliances necessary for handling and setting the huge blocks. He also rebuilt the Grattan and O'Connell bridges, and built the Butt bridge across the Lifley. This lot comes with an A4 folder of research assembled by the vendor on the history of the microscopes previous owners and includes copies of wills and auction catalogues.        

A Large & Impressive Ross No.1 Binocular Microscope Outfit, English, c.1870, signed to the rear of the foot ‘ROSS, LONDON 3448’, Standing on a massive ‘Y’ shaped base with tall uprights supporting the microscope body on massive trunnions with friction break, large plano-concave mirror in articulated arm on sliding collar, fully mechanical substage with screw X-Y control, engraved scale with vernier, crown and pinion gear, with rack and pinion focusing, large mechanical stage with engraved scale around the edge, crown and pinion gear, X-Y control via rack and screw, large rectangular bar with rackwork to the rear, bar limb incorporating fine focusing mechanism, Wenham prism in pull out brass drawer, binocular eyepieces engraved at the base ‘WENHAMS BINOCULAR By Ross, London’ with inter-ocular rackwork to the top, in a large mahogany case with the following accessories;A 3in objective in a can engraved ‘Ross London’.A 1in objective in a can engraved ‘Ross London’.A 1/2in objective in a can engraved ‘Ross London’A 1/5in objective in a can engraved ‘Ross London’.A double nosepiece engraved ‘Ross London’.A pair of low power eyepieces engraved ‘A’.A pair of medium power eyepieces engraved ‘B’.An eyepiece engraved ‘C Kelners Orthoscopic, Ross London’.An eyepiece engraved ‘C’.An eyepiece engraved ‘E’.An eyepiece engraved ‘F’.An ‘English’ length monocular bodytube.A ‘European’ length monocular bodytube.A Stage mounted side reflector.A stage mounted clamp.A stage mounted bulls-eye condenser.A large compressor engraved ‘Ross London’.A pair of LeiberkuhnsAn analyserA substage polariser with 3 selenite disks.A substage wheel of stops.A substage Wenham-type parabolic condenser.A very large table bulls-eye condenser.

A Swift Binocular "Challenge" Microscope, English, c. 1880, signed to the rear of the foot ’J. Swift & Son 81 Tottenham Court Rd, London’, standing on a black lacquered brass tripod base with trunnions supporting the main body, with plano-concave mirror in a gimbal on an articulated arm, polarising substage assembly with graduated polariser on swing out arm, rotating wheel to accept Selenite filters in geared rotating collars all on slide in/out mount with rack and pinion focusing, fully mechanical stage with with 360 degree engraved scale to edge with Vernier to 5’, X & Y control, body tube with course focus to rear and Swift’s patent lever fine focus, body tube with Wenham prism in pull out/in drawer, Nicol prism in pull out/in drawer, with the following accessories: a Swift 4in objective, a 2in objective, a 1in Swift objective, a 1/2in Swift objective, a 1/4in objective, a 1/4in Swift objective, a pair of binocular eyepieces engraved A, a pair of binocular eyepieces engraved B, a pair of binocular eyepieces engraved x10, all in the original French polished mahogany cabinet. Cabinet height 44cm

A Small Astronomical Quadrant, Scottish, c.1790, engraved 'P Hill EDIN'r', instrument supported on a compass-type joint to underside of baseplate with bubble, second compass type joint supporting the body of the instrument with two adjusting screws, horizon sight, long bubble, inverted 2-3/4” ) radius openwork quadrant with 0° - 90°- 120° scale with one-arcminute vernier, and pinion with external rack, telescope with push/pull focus and non-erect image, on later turned stand, instrument height 22.5cm

HAWES, LONDON. A GEORGE III FIGURED MAHOGANY BOW FRONT STICK BAROMETER the moulded pediment above a glazed calibrated silvered dial with two rack and pinion adjustable vernier, the body enclosing a mercury-filled tube with calibrated thermometer scale to the front 98cm high