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Adie London No. 1517 marine barometer, silvered dial vernier scale, black painted steel casing with gymbag (wall mount missing), 104cm (41") high.

A vintage marine sextant 1919 (ex Cunard) by Johannson of London, in brass and japanned metal with scale on silver with vernier and eyepiece, with 2 telescopes, eyepieces and filters, in original mahogany box(A Cunard label on the bottom shows transfer voyage of SS Queen Elizabeth on 31st May 1967)

A George III mahogany stick barometer by Fraser & Son London, the broken pediment centred with a brass urn, above a silvered dial with an adjustable Vernier scale and signed 'Fraser & Son London', the moulded case with a turned cistern cover, 94.5cm high. Provenance: The estate of the late John F. Braund.

Solid brass construction 2-axis transit with levels, table stand.Great display model of a traditional surveyor's transit scope- a swivel base of solid brass is fitted with adjustable tribrach feet for level display; the pivoting azimuth can be locked, and features a vernier degree scale. Spirit levels and compass complete the look, and focus is adjustable by way of a classic pull-tube design. A splendid little example which comes in a brass-fitted wood case. Issued: Late 20th c. Dimensions: 10.5"L x 7.5"W x 8.25"H, in case Condition: Good,as-is, display

A VICTORIAN MAHOGANY SYMPIESOMETERBy Thomas Keohan, London, circa 1850In a glazed rectangular case, with silvered dial signed KEOHAN. 2 ARBOUR TERRACE, COMMERCIAL ROAD, LONDON, and IMPROV'D SYMPIESOMETER 2248 at the base of the scale, a mercury thermometer (broken) to the left and oil pressure tube to the right, with adjustable vernier, chip to pediment58cm highThomas Keohan was a mathematical instrument maker and optician, recorded working from 1816-1873. He was at 2 Arbour Terrace 1840-1858.

AN 8IN. RADIUS VERNIER SEXTANT BY WILLIAM DOLLOND, LONDON, CIRCA 1860, OWNED BY WALTER GOODSALL, NAVIGATION OFFICER ABOARD THE S.S. GREAT EASTERN CIRCA 1865 the arc signed Dollond London and inscribed Silver above '70' with inset scale divided to 145°, ebonised brass T-frame, vernier with magnifier on horizontal tangent screw adjustment and glass light diffuser, braced index arm, mirrors and seven shades on oxidised frame section, wooden handle and three pin feet, contained within fitted baize-lined keystone box of issue with inset owner's plate inscribed Walter Goodsall , accessories including four sighting tubes and filter -- 11in. (28cm.) wide Provenance: Walter Goodsall to Captain Inch via auction. ~~*~~ Walter Goodsall, Master Mariner (1848-c.1900) went to sea as an apprentice on the Rajah of Cochin in 1863 and, in 1867, joined the Bombay Shipping Company as a Second Mate. His submarine telegraph career began when he was made Third Officer on the Telegraph Construction and Maintenance Company's cable laying ship K angaroo in 1871, laying a cable from Singapore to Hong Kong, and as Second officer on that company's cable laying ship Vanessa he participated in the laying of the duplicate Placentia-St.Pierre-Sydney cable between 1872-73. Late in 1873 he was Third Navigating Officer aboard the Great Eastern , working on the cable from Valentia-Newfoundland. He went on to command other cable ships, including the Chiltern when it was deployed in the Red Sea between 1883-84. His papers are divided between Greenwich and the Public Records Office, Kew.

Ø A 9½IN. RADIUS VERNIER OCTANT BY THOMAS CHRISTIAN, LONDON, CIRCA 1820 signed on the cross bar as per title and addressed for 102 Strand , main ivory scale divided to 100°, vernier on braced brass index arm, mirrors, three shades and pinhole sight, pencil and note plate and three pin feet, contained within fitted keystone box, with correspondence to Greenwich dated 1960 and some sextant instructions priced 10p -- 11in. (28cm.) wide

A FINE 8½IN. RADIUS VERNIER SEXTANT BY WILLIAM CHARLES COX, PLYMOUTH, CIRCA 1825 the lattice frame retaining much original lacquered finish, signed above the vernier COX Plym Dock , inset silver scale divided to 130°, braced index arm with swivelling magnifier, mirrors, seven shades, wooden handle and three pin feet, contained within fitted keystone box of issue with near complete set of accessories, securing hooks and lock -- 14in. (35.5cm.) wide

A 4IN. RADIUS VERNIER SEXTANT BY CARY, LONDON, CIRCA 1893 the oxidised brass T-frame with polished arc signed and inscribed Cary London 1089 , with inset silver scale divided to 150°, vernier with swivel magnifier, mirrors, six shades, pin feet and wooden handle with stand escutcheon, contained within fitted wooden box with accessories including three sighting tubes and the lid inset with test certificate dated 1893 – 7in. (18cm.) diam

A 7IN. RADIUS VERNIER SEXTANT BY C. PLATH, HAMBURG, CIRCA 1925 the ebonised ladder frame with polished arc signed as per title and complete with maker's trade mark to left and numbered 10377 , inset silvered scale divided to 150°, vernier stamped D.R.G.M. 724619 724624 / 25 with quick release clamp, glass glare deflector and swivel magnifier, two mirrors and seven shades, threaded sprung site assembly and wooden handle threaded pin feet, stamped 13 behind main mirror, contained within fitted box of issue with accessories including sighting tubes, mounting assembly, filters and quill-handled brush, with correction certificate inside lid dated 1925 and maker's label, and owner's plate inscribed D. Campbell to front, securing hook and handle -- 12in. (30.5cm.) square

A FINE THEODOLITE BY DENNERT & PAPE, HAMBURG, CIRCA 1894 constructed in oxidised and lacquered brass, the 11in. telescope with bubble level and circular vernier scale, mounted by A-frames to patinated brass platform signed as per title and numbered 12561 , bubble level to centre, opposing verniers with magnifiers, silvered scales with gilt edging and bevelled glass covers, sprung retention throughout and threaded levelling screw to feet -- 13in. (33cm.) high overall

A FINE UNIVERSAL THEODOLITE BY TROUGHTON & SIMMS LONDON, CIRCA 1900 constructed in lacquered and oxidised brass, the 9in. main tube with rack-and-pinion focussing to objective, mounted to a circular protractor with double bubble level twin verniers and oil lamp transit illumination, secured to A-frame over swivelling platform signed as per title with further vernier scale and bubble levels to tri-form base with adjustable feet -- 15in. (38cm.) high overall; together with a modern period-style electric transit lamp secured to perspex display base

Early 19th century mahogany stick barometer, Marsh - Diss, the arched case with plain neck with visible tube to a demi-lune cistern cover and set with a two-part ivory scale with sliding Vernier and marked from 27:31, height 92cm

A 19th Century brass cased pocket sextant by Elliot Brothers, London, silvered scale and vernier, the underside of the case inscribed 'JDH Waller' (believed to be Colonel JDH Waller), 7cm diam.

{} A Mahogany Stick Barometer, signed A Pagani, circa 1810, broken arch pediment, exposed mercury tube with a single vernier scale signed, turned cistern cover, 97.5cm high 03.04.19. Case with scratches and chips round the door and small dents, dial needs re-silvering, mercury tube looks complete and with visible mercury in the tube.

A Mahogany Stick Barometer, signed C Johnson, Newark, circa 1870, concealed mercury tube with a single ivory vernier scale, thermometer box, turned cistern cover, 93cm high 03.04.19. Top side of the pediment with veneer missing, ivory dials are discoloured, mercury tube looks complete with mercury visible in the tube, thermometer tube looks complete.

ϒAn ebony and brass navigational octant, Spencer, Browning and Rust, London, early 19th century, the 11 inch frame incorporating central T-shaped hand-piece inset with bone signature plate inscribed .Spencer. Browning & Rust. London. beneath turned bone finial, the pivoted arm mounted with mirror opposing aperture for reading the inset bone Vernier scale stamped SBR with clamp and endless screw adjustment to underside, with pin-hole sight opposing horizon glass, set of hinged filters, backsight and conforming horizon, the tapered oak case with stepped lid, 35.5cm (14ins) long.Provenance: Private collection, Hampshire; label attached indicating a purchase price of £460 (undated). The partnership between William Spencer, Richard Browning and Ebenezer Rust is recorded in Clifton, Gloria Directory of British Scientific Instrument Makers 1550-1851 as working from several addresses in Wapping, London 1784-1840. All of the founding partners had died by 1819 but the business continued trading in their name by their successors until becoming Spencer Browning and Company in 1840. They were agents for Alexander Adie and are noted for their navigational and surveying instruments. ϒ Indicates that this lot may be subject to CITES regulations when exported. Please see our Terms & Conditions for more information.

A 19th Century brass cased pocket sextant by Elliot Brothers, London, silvered scale and vernier, the underside of the case inscribed 'JDH Waller' (believed to be Colonel JDH Waller), 7cm diam.

DIP CIRCLE. A mahogany cased dip circle by W. & J. George Ltd., Birmingham & F.E. Becker & Co., London. The dip circle raised on a column with vernier scale above a circular plinth with three adjustable feet. Height 27cm. Width 14cm. Plinth diameter 16cm.

A mid-19th century rosewood stick barometer, the arched top with ivorine scale signed 'J. H. Steward, 459 West Strand London', a mercury thermometer to the left and sliding vernier scale to the right, over a flat trunk with mercury tube and turned cistern cover to the base, 36in. (91.5cm.) high., *Condition:Ivorine yellowed. One of brass claws holding top of thermometer missing but still secure. Brass fitting securing top of main tube a little dented. Needs cleaning.

A George III mahogany stick barometer by Fasana of Bath, the arched brass dial with a vernier scale adjuster, signed 'Fasana BATH', in a moulded case, with book matched veneers and a well cover, 93.4cm high.

AN ENGLISH BRASS AND EBONY OCTANT, SPENCER BROWNING & RUST, LONDON, C1800 with divided ivory arc, vernier and name tablet, on three feet, 35cm l, oak box++Vernier incomplete, vernier scale cracked, frame, brass and ivory in good condition and basically complete and entirely original, silvering on mirrors mostly lost. The three glass coloured filters original and undamaged. Instrument stiff in operation from long having been displayed as a wall piece, not cleaned or restored, the wooden box probably original but repaired and black painted at later date, the interior retaining two 19th c fragmentary printed trade labels

Early Victorian mahogany-veneered stick barometer, Alexander Alexander, Exeter, the two-piece ivory scale reading from 27" to 31" of pressure with Remarks, signed above Alex'r Alexander Optician to Her Majesty, Exeter with vernier, the partially-exposed main tube in arched surround with adjusting knob, the slender trunk with silvered ethanol Fahrenheit thermometer over a turned cistern cover, 92cm high Condition: Disclaimer - Please see item 20 of our Conditions of Sale relating to clocks, watches and mechanical items

Late 19th century walnut cased "Admiral Fitzroy's Barometer" of carved and shaped pediment to a signed and paper label with central glass tube and twin Vernier scales over a storey glass (a/f) and twin scale thermometer (losses and damage throughout), height 116cms

A George III mahogany mercury stick barometer with hygrometer, John Hawting, Oxford, circa 1790 The chevron line inlaid and crossbanded case with open triangular pediment and cavetto cornice above hygrometer, the inset silvered Vernier scale calibrated in barometric inches to the right hand margin opposing weather observations over engraved putto infill to the left, the upper margin signed Jn’o Hawting, Oxford set behind flush hinged glazed door, the trunk with conforming inset silvered Fahrenheit scale alcohol tube behind hinged glazed cover, the rounded base with hemispherical domed cistern cover above brass level adjustment screw to underside, 114cm (41ins) high.John Hawting is recorded in Baillie, G.H. Watchmakers & Clockmakers of the World as working in Oxford 1765-91.

ϒA fine and rare George III mahogany mercury mountain stick barometer, Dollond, London, late 18th century The slender square section mahogany case comprising full-height lift-off front section secured by sprung clasps to the sides, the interior with slender silvered brass Vernier scale calibrated in barometric inches from 17 inches to over 32 inches divided into twentieths and annotated 18-32 to right hand margin, the left hand side with engraved signature Dollond, London over glass tube terminating with a cylindrical glass cistern with fixed ivory stopper to upper edge and threaded ivory tube-height adjustment screw to base engaging with a decoratively-turned threaded eye secured via an adjustable slide to the rear of the case, the exterior with chamfered slot behind the scale for viewing the tube from the rear, 98.5cm (38.75ins) high. Provenance: Private collection Hampshire (ref. B30); purchased from Asprey, London, 16th December 1987 for £1,500. 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 business was continued by Peter Dollond's nephew, George Huggins, who changed his name to Dollond. George Dollond became instrument maker to William IV and Queen Victoria, exhibited at the Great Exhibition in 1851 and died 1856.Soon after the invention of the barometer in the 17th century it was observed that air pressure decreased with altitude. However, it was not until the latter part of the 18th century before an accurate mathematical relationship between height and drop in air pressure had been devised allowing barometers to be made with the intention of measuring altitude. The current lot is of relatively lightweight construction and the design of the cistern allows a degree of portability. This, coupled with the elongated scale (potentially allowing a range of around 15,000 feet to be observed), indicates that the instrument was clearly designed for mountain use and as such is a relatively early example of a mercury barometer made for this purpose. ϒ  Indicates that this lot may be subject to CITES regulations when exported. Please see our Terms & Conditions for more information.

A George III mahogany mercury tube stick barometer, Lincoln, London, circa 1800 With open triangular pediment over rectangular glazed silvered brass Vernier scale calibrated in barometric inches and with the usual observations beneath engraved signature Lincoln, London to upper right margin opposing spirit Fahrenheit scale thermometer to left hand side, set behind hinged glazed door with convex lower angles over chevron line edged caddy moulded trunk incorporating visible tube, the rounded base with domed cistern cover, 97cm (38.25ins) high excluding finial. A Charles Lincoln is recorded in Banfield, Edwin BAROMETER MAKERS AND RETAILERS 1660-1900 as working from 11 Cornhill, London in 1763 then at 62 Leadenhall Street from 1791 until his death in 1807.

A French rhodium or chrome plated brass camera lucida, P. Berville, Paris, circa 1900 With two-draw telescopic arm fitted with universal pivot carrying small glass prism inset into an oxidised carrier incorporating a slot to carry one from a choice of eleven glass lenses/slides present with the lot, the opposing end with thumbscrew clamp for fitting to the edge of a table incorporating lockable pivot for the arm and inscribed CHAMBRE CLAIRE UNIVERSELLE, MODELE DEPOSE, P. BERVILLE - 25 Chausee d’Antin. PARIS, in red velvet lined fabric covered case further stamped with makers name to the inside of the lid, the box 28cm (11ins) wide; with a German stainless and japanned steel planimeter, inscribed Maho No. 60, early 20th century, of Polar type with tracer and arm incorporating Vernier scale within frame incorporating measuring wheel, dial, support wheel and pivot for the pole arm terminating with pinned anchor weight, the pole arm inscribed Maho No. 60, in purple velvet lined fabric covered case, 26cm (10.25ins) wide, (2). The camera lucida allows an artis/draughtsman to trace the form of a three-dimensional object by viewing a reflection of the object via the prism and lens assembly connected to the end of the telescopic arm. The design was patented by William Hyde Wollaston in 1806 although the principals of the instrument had been outlined by Johannes Kepler in his Dioptrice in 1611.The planimeter allows the area of a shape to be measured by tracing around its outline and has historically proven useful in cartography and surveying photography. The polar planimeter was developed in 1854 by The Swiss mathematician Jakob Amsler-Laffon although the design had been pioneered by Johann Martin Hermann in 1814.

ϒA fine and unusual William IV mahogany wall mounted mercury pillar barometer, Dollond, London, circa 1830 The domed leaf-carved top panel with circular cavetto upstrand incorporating Vernier adjustment screw over three-quarter cylinder glazed canted silvered Vernier scale calibrated from 26.5 to 31 inches and decorated with a fine Fleur-de-lys motif beneath signature DOLLOND, LONDON to upper margin, the right hand side with conforming canted silvered Fahrenheit and Centigrade scale mercury tube thermometer, the cavetto throat carved with repeating lappet leaves over cylindrical upright and larger diameter fluted cistern incorporating ivory float to leaf carved upper moulding, the ogee-shaped base with level adjustment screw, the whole applied to an arched caddy-moulded back panel, 100cm (39.5ins) high. 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 business was continued by Peter Dollond's nephew, George Huggins, who changed his name to Dollond. George Dollond became instrument maker to William IV and Queen Victoria, exhibited at the Great Exhibition in 1851 and died 1856. ϒ  Indicates that this lot may be subject to CITES regulations when exported. Please see our Terms & Conditions for more information.

H G Blair & Co. (Cardiff & Barry) Sextant with black frame, ivory handle and Vernier scale engraved with makers name 7 1/2'', 19cm diameter (some general wear and deterioration form use) with accessories in original mahogany case with retailers label ''Wilson & Gillie, Bruce & Sons (Cardiff)'', Certificate of Examination from the National Physical Laboratory (Surrey) dated July 1905; a Port of New York Alien Seamans Identification Card no.101317 for John James Crosthwaite originally dated for an arrival on SS Siberian Prince 30 Aug 1919 and with subsequent arrivals

Stanley (London) Circular Protractor brass with Vernier scale; a further Stanley Circular Protractor with interchangeable arms (both cased); a set a Wooden curves and assorted loose rules and other items

Surveyors Levels (i) Hall Bro (Supplied by J A Reynolds) black lacquered (cased) (ii) unnamed brass example with Vernier scale (cased) (iii) Dumpy level, black lacquered (3)

Dividers, rulers, Mitutoyo Vernier scale, micrometer magnifier, etc:- One Box

An early 18th century style walnut and brass portable stick barometer after Daniel Quare, the silvered dial with two vernier scale pointers adjusted by rack and pinion by the urn finials, with floral engraved decoration, the stop fluted stem above a spiral twist base and on four folding supports decorated with swags and masks, mid-20th century, 101.8cm high. Provenance: The Collection of Sir Jeremy Lever.

A George III mahogany stick barometer by Thomas Blunt of London, the arched silvered dial signed 'T. Blunt London', with an adjustable vernier scale, exposed tube and a moulded case, 89.2cm long. Provenance: The Collection of Sir Jeremy Lever.

λ An early Victorian Scottish mahogany stick barometer by A. Abraham of Glasgow, with an arched ivory dial signed 'A.ABRAHAM & CO. GLASGOW', with an adjustable vernier scale, the flame veneered case with a moulded edge, the back with a handwritten paper label inscribed 'Captain Which', 91.5cm long. Provenance: The Collection of Sir Jeremy Lever.

A mid-20th century Husun black lacquered and brass triple ring sextant no. 44077 by Henry Hughes & Son, having a 6' radius with silvered vernier scale further stamped H. Hughes & Son Ltd London 44077, with accessories in a fitted case with brass handle, with Kelvin Hughes inspection label to the lid interior, dated 28/10/58, w.27, d.28, h.14cm.

Portuguese brass marine stick barometer signed JJ BLM, 16 a 22 R N Desterro, Lisbon, with gimball bracket, the silvered dial with engraved predictions and Vernier scale, 94cm tall

Mid-19th century flame mahogany and ivory stick barometer, Spendlove - Thetford, the arched case with glazed panel with bevelled ivory scales marked from Very Dry to Stormy and opposed by 31 to 27 with slide Vernier and visible tube over a further twin scale ivory thermometer with mercury tube and ring turned cistern cover, height 92cms

Second half of 19th century mahogany cased Sympiesometer, the rectangular glazed mahogany case with shaped pediment to a silvered mount signed J Poole, 57 Fenchurch St - London "Improved Sympiesometer" and set with a single scale Fahrenheit mercury thermometer flanked by a barometric tube with screw adjusting Vernier scale over a further disc rotating scale and numbered 2961, height 58cms

A 1920's Fortin stick barometer and thermometer by Casella of London, No.3152, with silvered cylindrical scale and vernier and mercury thermometer, contained in cylindrical black lacquered casing and cistern, 38ins high contained in mahogany and glazed case. Note: With Certificate of Examination dated 28th June 1928, No. 24-597

A 19th Century miniature lacquered brass sextant by Miller & Adie of Edinburgh, with engraved scale and vernier, 7.75ins drop x 7.75ins overall (incomplete and lacking eye piece), contained in mahogany fitted box

Ø A 11½IN. RADIUS VERNIER OCTANT, CIRCA 1800 unsigned , the ebony T-frame with scale divided on Ramsden's engine to 100°, brass index arm, double pinhole sight with shade, three interchange shades, two mirrors with single pinhole sight -- 14in. (35.5cm) high overall; together with a 9½in. radius example by Spencer & Co., London (2)

Ø AN 11½IN. RADIUS OCTANT BY J.W. NORIE & CO., LONDON, CIRCA 1820 the ebony T-frame inset with ivory maker's label signed as per title, inset ivory scale divided to 100°, braced brass index arm with vernier scale, sight with swivelling shade, two mirrors, three shades and brass pin feet behind, contained within painted stepped keystone box of issue with decorative lock escutcheon, securing hook and owner's name inscribed C.B. Bushell inside lid -- 13in. (33cm.) wide

A 8IN. RADIUS DOUBLE-FRAMED PLATINUM-SCALED SEXTANT BY EDWARD TROUGHTON, LONDON, CIRCA 1820 the ebonised T-frame with polished brass arc signed Troughton London and inscribed Platina and with later owner's stamp EE the inset scale divided to 150°, vernier with bridge mounted swivelling magnifier, braced index arm, two mirrors, seven shades, contained within fitted keystone case with securing hook -- 10in. (25.5cm.) wide

A 8¼IN. RADIUS VERNIER SEXTANT BY THOMAS JONES, LONDON, CIRCA 1811 the oxidised brass lattice frame with polished brass arc signed Thos Jones, 21 Oxenden Street, London and engraved Capt Leyland, inset silvered scale divided to 130º, vernier with magnifier, seven shades, two mirrors and wooden handle, contained within fitted keystone box of issue with sighting tubes, box -- 12½in. (32cm.) wide

A 7IN. RADIUS LATTICE FRAME SEXTANT BY F. SMITH & SONS OPTICIANS, SOUTHAMPTON & COWES, CIRCA 1890 with oxidised brass frame, signed on the arc as per title with inset silvered scale divided to 150°, vernier with magnifier, mirrors, seven shades and wooden handle, contained in original fitted case with four sighting tubes and accessories -- 11in. (28cm.) wide

A LATE 18TH CENTURY 8IN. RADIUS OCTANT with oxidised brass T-frame, arc with inset scale divided to 110°, lacquered brass vernier with magnifier, seven shades, two mirrors, contained in original fitted case, two sighting tubes and filter, securing hooks and drop handle -- case 11½in. (28.5cm.) wide

Ø A 7½IN. RADIUS VERNIER SEXTANT BY BOTTOMLEY, LONDON, CIRCA 1890 the oxidised brass ladder frame with polished brass arc signed as per title and numbered 5039 and inscribed R.M. Harboard, R.N. , inset silvered scale divided to 140º, vernier with magnifier, seven shades, two mirrors and ebony handle, contained within box of issue with arsenic green maker's label in lid and correction certificate from 1974, sighting tubes, box -- 11in. (28cm.) wide

A SOLID SILVER MINIATURE SURVEYING QUINTANT BY CARY, LONDON, CIRCA 1830, BELIEVED TO HAVE BEEN OWNED BY ISAMBARD KINGDOM BRUNEL AND PASSED TO HIS SON HENRY MARC BRUNEL the 3in. radius T-frame signed on the cross bar as per title with scale divided to 150°, vernier with ebonised magnifier, pinhole sight and index mirror with ebonised platform, contained within fitted box of issue with inset brass plate to lid inscribed H.M. Brunel -- box 4¾in. (12cm.) square Provenance: Lady Cynthia Noble Jebb (1898-1990) great granddaughter of Isambard Kingdom Brunel; private sale to vendor by her daughter c.1990. IKB's sons died childless, thus his collection passed down the female line via his daughter Florence Coleridge née Brunel (1847-1876) who in turn had daughters Celia Brunel (1872-1962) and Lillian. Celia Brunel made the principal donation of artefacts to Bristol University in 1950, however it seems some items were retained as her daughter, Lady Cynthia Noble Jebb (1898-1990) passed on this lot as part of a group to one of her daughters, possibly Vanessa Thomas, who had them evaluated when winding up her mother's estate.

A RARE UNIVERSAL THEODOLITE BY PISTOR & MARTINS, BERLIN, CIRCA 1860 constructed in lacquered brass, the 8½in. main sighting telescope with rack-and-pinion focussing, mounted on an axis to circular silvered scale inset to plate signed as per title and numbered 1202, telescopic vernier readers with micrometer adjustment, bubble levels (one detachable), mounted on central pillar to protractor plate and three adjustable feet -- 11in. (28cm.) high: together with a brass case containing two alternate eyepieces, a plummet bob and spring stabliser

A Victorian rosewood sympiesometerBy Thomas Roberts, Liverpool, circa 1865The rectangular glazed case with a silvered scale, signed THOS. ROBERTS MAKER TO THE ADMIRALTY 34 STRAND STRT. LIVERPOOL, and IMPROVED SYMPIESOMETER with vernier scale and thermometer58cm high Thomas Roberts is recorded as working at 34 Strand, Liverpool 1860-73. He was a chronometer maker (see T. Mercer, Chronometer Makers of the World, London 2004).

A George III mahogany stick barometerBy J. Bleuler, London, circa 1790With a swan neck pediment above a silvered glazed scale, signed, with thermometer and vernier, above a well-figured trunk with moulded edge and turned cistern cover98cm high

Limbach (Hull) Octant ebony frame with ivory inlay and Vernier scale 11'', 27cm diameter (cased)

Antique ebony & brass octant 19th century, with ebony frame, ivory inlay and Vernier scale, in timber box. No makers marks.

Spencer Browning and Co, London, a 19th century mahogany marine barometer: the bone dials aslant having typical barometer markings with a vernier scale set from below and signed within the arch by the maker Spencer Browing & Co, London, the mahogany curved top case having a brass cistern to the base and brass bound holes for fixing to a gymbal, height 94cms.* Notes Spencer, Browning & Co are recorded as working at 327, Wapping, London in circa 1783 and then 66, Wapping from circa 1801 until at least 1838. Also known as Spencer & Co, and Spencer, Browing & Rust.

A George III style mahogany and boxwood strung stick barometer, in architectural case, with silvered dial signed 'A Comitti and Son, London', with barometer and vernier scale and circular cistern cover, 96cm high

A 19th Century mahogany cased stick barometer and thermometer by Edward Bates of Pettoring(?), with silvered scale vernier and alcohol thermometer, contained in mahogany case inlaid with ebony stringings, with angled pediment and turned cistern cover, 38ins, and a 19th Century mahogany cased wheel barometer and thermometer, by Colpman of Wellingborough, the 8ins diameter silvered dial with alcohol thermometer contained in plain case, 40ins

MOWRRAY, HARTLEPOOL. A GEORGE III MAHOGANY MARINE BAROMETER the case with bone name plaque above a hinged door opening to reveal a calibrated bone scale with rack and pinion vernier and bone thermometer on slender trunk with brass cylindrical cistern cover, the barometer supported on a brass gimbal on cast brass sea serpent bracket 95cm high

Victorian oak stick barometer, by F L West, Cockspur Street, Charing Cross, London, having an upper barometric (or vernier) scale over a thermometer, height 96cm