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Click here to subscribeA Good Mahogany Stick Barometer, signed F.Cox, 100 Newgate St, London, circa 1850, concealed mercury tube with a twin ivory vernier scale signed, well figured case with thermometer box and ivory plaque inscribed ''standard barometer'', stepped cistern cover, 100cm high see illustration 30.01.20 Case with small scratches and dents in parts, surfaces are slightly rubbed in parts, mercury tube is full and looks complete.
A Very Fine Theodolite,English, C.1870, signed on the large silvered compass 'Bennett London', on 4 adjusting feet with lock and fine adjustment, 6 1/2in silver horizontal scale with two vernier scales, lock to compass needle, two spirit levels, 'A' frame support to trunnions supporting frame to hold reversable telescope with clamps, semi-circular vertical scale with gear drive and single vernier scale, in original mahogany case, instrument height 25cm
A Good Bell-framed Sextant,by Heath & Co, 1912, 7 inch radius, silver scale reading to 10 arc-seconds by Vernier, three telescopes and sighting tube, main telescope with two eyepieces, patent greatest angle clamp, filters, adjusting pin and key, mahogany case (cracked) with Kew Observatory Certificate
A good second quarter of the 19th century mahogany bow front barometer with ivory floatsigned Wm. Duncan, Optician, 92, Union Street, Aberdeenthe concave cornice over a flame veneered trunk set with a recording knob and mercury thermometer, terminating in canted front angles and a turned ebony cistern cover with in-set ivory float, the wide bore tube reading against a 27-31' scale with rack and pinion vernier, 98cms highThis lot is subject to the following lot symbols: TP Y ФTP 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.Y Subject to CITES regulations when exporting items outside of the EU, see clause 13.Ф This lot contains or is made of ivory. The United States Government has banned the import of ivory into the USA.For further information on this lot please visit Bonhams.com
A good late 18th century feather banded mahogany stick barometersigned B.Molinaru, Plymouththe broken architectural pediment centred by a turned brass urn finial over an opening glazed hood door and visible tube terminating in a turned cistern cover, the signed silvered scale with alcohol thermometer and manual vernier reading against seven weather predictions, 97cms 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
A good late 18th century mahogany Scottish stick barometersigned Molliner, Edinburghthe waisted case with open tube terminating in a typical turned oval cistern cover, the one-piece signed silvered dial engraved in copperplate script with twelve weather predictions including those specific to winter, ie 'Set Frost, Much Snow and Tempest' with manual vernier reading against 28-31' scale, 95cms 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
A Thomas Jones mahogany marine barometer, English, early 19th century,signed Thomas Jones, Charing Cross London, the mahogany casing with ebonised reservoir cover and mercury adjustment control below in gimbal mounts, with hinged door above opening to silvered brass scale with vernier and mercury thermometer, 37in (94cm) high
A W. & S. Jones mahogany stick barometer, English, early 19th century, English, early 19th century,signed W. & S. Jones, London, with bow fronted case, ebony lining and urn shaped reservoir cover, mounted at the front with mercury thermometer and hydrometer, with silvered brass barometer scale above with vernier, adjusted by bone handle below, surmounted by scrolling pediment and urn finial, 38½in (98cm) high This lot is subject to the following lot symbols: YY Subject to CITES regulations when exporting items outside of the EU, see clause 13.
A P. Manticha mahogany stick barometer, English, late 18th century,signed by P. Manticha, Crown, Holborn, London, the case with boxwood and ebony banded lining, central marquetry panel of flowers, surmounted by circular silvered brass dial with alcohol thermometer and barometer scale with vernier, 35½in (90cm) high
A Lione & Co mahogany stick barometer, English, early 19th century,signed Lione & Co, NO. 125 Holborn Hill London, with silvered brass scale with vernier, mounted with alcohol thermometer, mahogany wall case with domed reservoir cover, arched pediment above, with urn finial, 38in (97cm) high
A Dollond mahogany stick barometer, English, late 18th century,signed Dollond London, the bow fronted case with silvered brass scale and vernier adjusted by bone handle mounted below, the case with ebonised lining and shaped reservoir cover in ebony, and inset with adjustable hydrometer and mercury thermometer, with adjustable marker, 39in (99cm) high
ϒA Regency mahogany mercury cistern tube stick barometer, W. and S. Jones, London, early 19th century, with swan neck pediment and cavetto cornice over rectangular glazed silvered brass Vernier scale calibrated in barometric inches and with the usual observations beneath engraved signature W. & S. Jones, Holborn, LONDON to the right hand side opposing mercury Fahrenheit scale thermometer to the left, with ebony line edged surround continuing down to form decorative edge stinging for the flame figured trunk incorporating Vernier adjustment screw to throat, the base with domed cistern cover applied to a circular section with level adjustment to underside, 98cm (38ins) high excluding ivory vase finial.The partnership between the brothers William and Samuel Jones is recorded in Clifton, Gloria Directory of British Scientific Instrument Makers 1550-1851 as operating from several addresses in Holborn, London 1792-1859 (including 30 Holborn 1800-1860). 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 Stick Barometer, signed Dollond, London, circa 1800, exposed mercury tube with a single vernier scale signed, turned cistern cover, 101cm high see illustration 11.10.19 Case is slightly faded in parts, later brass finial, dial needs re-silvering, mercury tube with air bubbles, case with small scratches and small dents in parts, cistern cover with one small crack.
A George III gilt brass-mounted mahogany stick barometerBy Adams, LondonWith a swan-neck pediment above a silvered scale with vernier enclosed by a hinged door, above a silvered thermometer scale with brass hinged door, with turned cistern cover110cm high The Adams' business, established circa 1750 at Tycho Brahe's Head in Fleet Street, continued until 1826, on the death of George Adams' grandson, Dudley. The family were continual Royal Appointment Mathematical Instrument makers to George III.
A 7¼IN. RADIUS VERNIER SEXTANT BY KEEN & FRODSHAM, LIVERPOOL, CIRCA 1880 with oxidised brass ladder frame, arc signed as per title, scale divided to 145°, braced index arm with vernier and magnifier, mirrors, shades, wooden handle, contained within wooden box with five sighting tubes and maker's label, the lid for owner's plate for H.E. Watson -- 11in. (28cm.) wideCondition report: scale lifting to left side of arc, areas to wear to frame most noticeably around handle where held. Scale tarnished. Typical old wear commensurate with age.
A RARE 3¼IN. RADIUS FLYING BOAT MICROMETER SEXTANT BY HENRY HUGHES & SONS, LONDON, CIRCA 1941 the black crackle frame with brass arc scale divided to 120°, micrometer vernier adjustment, eye-piece with rubber cap, seven shades, mirrors and wooden handle, contained within fitted box of issue with test certificate dated 26.11.41 -- box 8¾in. (22cm.) wideCondition report: good overall condition, wear commensurate with age.
A FINE 4IN. RADIUS SEXTANT BY TROUGHTON & SIMMS, PRESENTED TO GENTLEMAN CADET WILLIAM E. WARRAND BY THE EAST INDIA COMPANY, JUNE 1849 the lacquered brass diamond-pattern frame signed on the arc as per title and the inset silvered scale divided to 160°, vernier with magnifier, mirrors, four shades, threaded ebony handle, contained within fitted keystone box of issue with tubes and filters, the lid with presentation plate inscribed to Warrand, from the Court of Directors for the East India Company -- 8¼in. (21cm.) diam
Ø A 13¾IN. RADIUS VERNIER SEXTANT BY SPENCER, BROWNING & RUST, LONDON, CIRCA 1800 the ebony T-frame with inset maker's label signed as per title, and ivory scale divided to 95° with SBR mark by 50°, plain index arm with vernier, pinhole sights, interchangeable shades and brass feet -- 16in. (40.5cm.) high overallCondition report: Old staining to ivory component, lacking reverse pinhole sights, note plate, pencil and case.
Ø A 10½IN. RADIUS VERNIER OCTANT BY CRIHTON [SIC], LONDON FOR A. DOBBIE, GLASGOW, CIRCA 1850 the ebony T-frame with inset ivory maker's plate signed for Crichton as per title, with ivory scale divided to 100º, braced brass index arm, pin hole sight, mirrors, shade and pin feet, contained within stepped keystone case -- 14in. (35.5cm.) wideCondition report: missing pencil, brass probably re-lacquered, case with replace top section.
A BRASS STATION POINTER BY W. LUDOLPH, BREMERHAVEN, CIRCA 1920 the 5½in. brass arc etched with scale, with removable vernier and magnifiers and sprung locating pin, braced arms with extensions in lid, contained within baise-lined fitted wooden box -- box 21in. (53.5cm.) wide; together with a brass roller rule in box, unsigned (2)Footnote: Provenance : Southampton Master Mariners; donated by a former Chief Marine Superintendent stating it was used by the Union-Castle Line.
A 7¾IN. RADIUS VERNIER OCTANT BY WILSON & GILLIE, NORTH SHIELDS, CIRCA 1890 with polished brass T-frame, signed on the arc as per title, with inset silvered scale divided 120°, braced index arm with magnifier, mirrors, seven shades, wooden handle and pinned feet, contained in fitted box with two sighting tubes -- 11in. (28cm.) wideCondition report: Frame polished, good overall condition.
A 7¾IN. RADIUS DOUBLE-FRAMED VERNIER SEXTANT, CIRCA 1840 unsigned , oxidised brass T-frame with arc numbered 4227 , inset silvered scale to 140°, vernier with magnifier, mirrors, shades, contained within keystone box with two sighting tubes -- 13in. (33cm.) wideCondition report: Frame a little dusty but fair overall condition. Box with typical wear commensurate with age..
Ø A MINIATURE 5¾IN. RADIUS VERNIER OCTANT BY JOHN GRAY, LIVERPOOL, CIRCA 1810 the ebony T-frame signed on the cross bar as per title, with ivory scale divided on Ramsden's division engine to 95°, with Ramsden mark by 50°, braced index arm with vernier scale, pinhole sight with tube thread, mirrors, six shades, wooden handle -- 7½in. (19cm.) high overallCondition report: restoration and refurbished. later mirrors, missing secondary pinhole sight assembly, lacking two pin feet. Instrument appears lacquered oveall and now yellowing the scale.
AN EXCEPTIONAL 8IN. RADIUS VERNIER SEXTANT BY WILLIAM DOLLOND, LONDON, CIRCA 1860 the lacquered brass and partially oxidised T-frame retaining most of its original finish, the arc signed Dollond London and inscribed Silver above '70' with inset scale divided to 145°, vernier with magnifier on horizontal tangent screw adjustment, and glass light diffuser, braced index arm, mirrors and seven shades on oxidised frame section, handle with stand clamp accessory and three pin feet, contained within fitted keystone box of issue with complete accessories including five eyepieces, filter and pin, with maker's label inside lid, and securing hook -- 14in. (36cm.) diameter
A 7IN. RADIUS VERNIER SEXTANT, PROBABLY FRENCH, CIRCA 1900 unsigned , polished brass curved bar frame, silvered scale divided to 150°, braced index arm with vernier, mirrors, shades, wooden handles, contained within fitted case with sighting tubes and accessories, with retailer's label for J. Sewell -- 11in. (28cm.) wideCondition report: Polished, old wear commensurate with age.
A 6¾IN. RADIUS BELL-FRAMED SEXTANT BY HEATH & CO., LONDON, CIRCA 1912 with oxidised brass frame, brass arc numbered J240 and signed as per title with inset silvered case, vernier with quick release clamp and bubble level, mirrors, shades, wooden handle with stand recess, contained within original fitted box with accessories and test certificate dated August 1912 inside lid -- 11in. (28cm.) wide; the lid with owner's plate inscribed R.H.T.Condition report: Scale tarnished, otherwise good overall condition. Crack through lid.
An Exceptionally Fine Powell & Lealand "No. 1" Compound Monocular/Binocular Microscope Outfit, English, dated 1871, signed in script to the top of the bar-limb ‘POWELL & LEALAND, 170 Euston Road, London’, 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 sliding on a collar, above which is the fully mechanical 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 a 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:Accessory box 1Constructed of French polished mahogany with brass hooks to the front this set contains:A 4in objective & can, objective engraved ‘POWELL & LEALAND’. A 1 1/2in objective & can, objective unsigned.A 1/2in Apo A.A. 0.64 objective and can engraved ‘POWELL & LEALAND’.A 2/3in objective & Can, objective and can engraved ‘POWELL & LEALAND’.A 1/10in objective & Can, objective and can engraved ‘POWELL & LEALAND’.A 1/4in Dry N.A 0.94 objective & Can, objective and can engraved ‘POWELL & LEALAND’.A 1/4in Water Imm N.A 1.26 objective & Can, objective and can engraved ‘POWELL & LEALAND’.A 1/6in Oil Imm N.A 1.5 No.3 objective & Can, objective and can engraved ‘POWELL & LEALAND’.A 1/8in Apo N.A 0.98 No.26 objective & Can, objective and can engraved ‘POWELL & LEALAND’.A 1/12in Apo Oil Imm N.A 1.4 No.158 objective & Can, objective and can engraved ‘POWELL & LEALAND’.A 1/16in Oil Imm N.A 1.43 No.17 objective & Can, objective and can engraved ‘POWELL & LEALAND’.A 1/16in Imm objective & Can, objective engraved ‘POWELL & LEALAND’with 1/16 dry Lens in a separate can.A 1/20in Oil Imm N.A 1.26 No.36 objective & Can, objective and can engraved ‘POWELL & LEALAND’.A 1/25in Oil Imm N.A 1.38 No.18 objective & Can, objective and can engraved ‘POWELL & LEALAND’.A substage objective holder.A substage ‘chromatic oil condenser’ engraved ‘POWELL & LEALAND’.Pair of medium power binocular eyepieces.High power eyepiece.High power eyepiece.High power eyepiece.High power eyepiece marked E 0.44”.High power eyepiece marked F 0.25”.Micrometer eyepiece.A vertical illuminator in a can engraved ‘Smith, Beck & Beck, London’ and engraved ‘99’.A vertical illuminator engraved ‘Powell & Lealand, Patent 21’.A sub-stage polariser.A Tourmaline Objective analyser.A set of substage selenites in rotating holders.A Nicol prism analyser.A Tourmaline eyepiece cap.A large polished section of quartz crystal.A set of stage forceps.Accessory box 2Constructed of French polished mahogany with brass hooks to the front this set contains:A substage apochromatic condenser engraved ‘POWELL & LEALAND N.A.1.4’.A set of patch stops in a can for the aforementioned condenser.A substage spot condenser.A substage Wenham-type parabolic condenser.A Substage hemispherical-type illuminator.A Substage mirror.An erector lens.An aluminium ‘bent’ objective changer.An eyepiece Lucida.A cased binocular prism engraved ‘For Low Powers & Opaque Objects’.A cased binocular prism engraved ‘Powell & Lealand No.57 Patent’.A large Ramsden-type eyepiece micrometer engraved ‘ROSS LONDON’.A side reflector.A live box.A fish plate.A Beck-type compressor.An adjustable compressor.Main CabinetConstructed of French polished mahogany with large brass handle, hooks, lock and key, as well as the microscope and two boxes of accessories the cabinet contains;A cased Apertometer Nach ABBE, in a red Moroccan leather covered case signed to the edge ‘c.Zeiss Jena’, with an objective and objective mount, apertometer constructed of glass with paper scale to edge.A cased Beck-type opaque disk rotator outfit, with lift out brass frame containing interchangeable pegs, rotator in the base of the case with fusee chain mechanism, with set of peg forceps in original French polished case.A Sorby-type microspectroscope signed ‘ROSS LONDON’ with rack and pinion focusing, mirror on adjustable arm to side.A large brass condenser base to accept; a large prism for monochromatic light; a large bullseye condenser, a tube support.A monocular body tube.Two eyepiece extension collars.A steel bar for adjusting the microscope.Dimensions: main case height 55cm.Notes:The opaque disk rotator has a coat of arms for ‘Edwin Clark’ with the moto TESTUS IGNE, possibly the engineer Edwin Clarke FRAS (1814-1894) who built the Anderton Boat Lift.The microscope comes with a clipping from the Antiques Trade Gazette from 1976, which claims that this microscope was bought for a then, record sum, of £1500.00 from a sale at T. R. G. Lawrence and son, Crewkerne.
A Petrological Challenge ‘B’ Microscope, English, c. 1880, signed to the rear of the foot ’J. Swift & Son 81 Tottenham Court Rd, London’, standing on a large 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 with silver verniers to .1mm, body tube with course focus to rear and Swift’s patent lever fine focus, body tube with Wenham prism in pull out/in drawer, Quartz wedge in 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.
An Irish Mercury Stick Barometer, c. 1810 by Joseph Ribaldi of Limerick, in mahogany, open pediment with urn finial, glazed door covering vernier scale and thermometer, signed 'I Ribaldi Limerick' height 96cm. Notes: A near identical barometer by Ribaldi is in the Municipal Museum Limerick. Shipping Note: Flints Auctions will drain mercury barometers for shipping if requested. There is a charge for this service.
ϒA Victorian oak mercury farmer’s stick barometer with wet and dry bulb thermometers W.R. Jeffrey, Saffron Walden, circa 1870 With concave upstand to the cavetto moulded cornice over ivory Vernier scale calibrated in barometric inches and annotated with Fitzroy’s foretelling flanked by Centigrade DRY BULB and WET BULB thermometers the latter with bulb wrapped in hessian draped into a glass water reservoir, the upper margin inscribed W.R. JEFFREY, Saffron Waldon, the slender trunk with visible tube over ogee moulded panel cistern cover to the rectangular base with level adjustment screw to underside, 98.5cm (38.75ins) high. W.R. Jeffrey is recorded in Banfield, Edwin BAROMETER MAKERS AND RETAILERS 1660-1900 as working in Saffron Walden circa 1850-70 The form current lot conforms to Negetti and Zambra’s Patent farmer’s barometer where the difference in readings between the wet and dry thermometers indicate the level of evaporation occurring from the wet bulb, hence providing an relative indication in the change of atmospheric humidity. ϒ Indicates that this lot may be subject to CITES regulations when exported. Please see our Terms & Conditions for more information.
An Austrian japanned brass theodolite Gebruder Fromme, Vienna, late 19th century The telescope with rack and pinion focus adjustment and fitted with a spirit level to top, mounted via a pivot fitted with a vertical silvered Vernier sector onto a curved support over rectangular table fitted with X and Y spirit levels and central glazed compass stamped GEBR. FROMME, WIEN, 632 and annotated N, O, S and W to centre within fine engraved outer degree scale, the lower section with horizontal circle with fine silver Vernier scale, locking and fine adjustment screws over triform ball and socket levelling joint and tapered tripod socket, in original hardwood box applied with trade label inscribed GEBRUDER FROMM, MATHEMATISCH-MECHANISCHES INSTITUT, WIEN, HAINBURGERSTRASSE N’R 21…, to inside of lid, the box 31cm (12.25 ins) deep. The Viennese firm of Gebruder Fromme was formed by brothers Adolf and Karl Fromme when they succeeded Joseph Perfler (established in 1835) in 1884. Their workshop was located at Hainburgerstrasse 21 until 1903 and the business continued in various guises until around 1970.
A rare oak cased mercury and glycerine long range barometer Negretti and Zambra, London, circa 1885 The ceramic scale inscribed NEGRETTI & ZAMBRA, LONDON, GLYCERINE & MERCURY, LONG RANGE BAROMETER to upper margin over visible glycerine filled tube and scale calibrated in reverse from 28 to 31 inches amplified over a distance of 25.5 inches divided into hundredths and with weather observations, the lower section with hipped panel applied with a mercury Fahrenheit and Centigrade scale thermometer set within ogee moulded frame with cavetto moulded pediment and canted skirt base, 108cm (42.5ins) high. The firm of Negretti & Zambra are recorded in Banfield, Edwin BAROMETER MAKERS AND RETAILERS 1660-1900 as being established in 1850 when a partnership between Enrico Negretti and Joseph Warren Zambra was formed. The firm became one of the most prolific makers of scientific instruments and continued trading well into the 20th century. The current lot was devised in around 1880 by Negretti and Zambra and is essentially constructed as a mercury and glycerine double-tube or contra-barometer but with only the glycerine filled section visible. Inside the case is a sealed mercury syphon tube of larger bore with the second visible glycerine filled (narrower-bore) column formed as an extension to the concealed open end of the mercury syphon. The unequal capacities of the two tubes together with the difference in specific gravity of mercury and glycerine results in a substantial amplification of the scale allowing the level to be read to one-hundredth of an inch without a Vernier.
A brass Kew Pattern marine mercury stick barometer F. Darton and Company Limited, London, circa 1933 The cylindrical silvered scale calibrated in barometric inches divided into twentieths opposing millibar scale with Vernier slide fitted flush within the central tube viewing aperture, the lower margin signed F. DARTON & Co. LTD, LONDON beneath No. 38/48. the upper margin engraved with crown motif over A.M., 4PP/1933, set behind cylindrical glass collar with brass suspension ring to top plate above Vernier adjustment screw, further plate repeat engraved with crown motif etc. and gimballed support to the slender cylindrical trunk applied with mercury tube Fahrenheit and Absolute thermometer, the base with moulded cylindrical iron cistern cover, 94cm (37ins) high; with mahogany plate fitted with brass sleeve bracket for wall mounting. The firm of Francis Darton and Company are recorced in Banfield, Edwin BAROMETER MAKERS & RETAILERS 1660-1900 as working at several addresses on St. John Street, London from 1834 and were still trading until the 1990’s. The current lot is made to the pattern of standard marine barometer devised by Patric Adie and John Welsh of the Kew observatory in 1855.
An unusual Continental lacquered brass theodolite Unsigned, mid to late 19th century With single-draw sighting telescope and spirit-level mounted onto the vertical circle with fine silvered perpendicular Vernier scale to circumference incorporating screw rack adjustment and clamp, mounted via an angled bracket, along with a second cross spirit level, onto a vertical pillar over conforming horizontal circle with silvered Vernier scale to circumference, the base with tapered tripod mounting socket post, in original hardwood box with hinged brass carrying handle to lid, 30.5cm (12ins) wide.
A George II/III mahogany mercury stick barometer J. Hogben, Rye, mid 18th century The break-arch silvered brass scale incorporating MOIST/DAMP, HYGROMETER scale with arbitrary calibrations 0-10 in both directions over herringbone bordered signature panel engraved J. Hogben, Rye Fecit and BAROMETER scale calibrated in barometric inches and with summer and winter observations next to a mercury tube Centigrade scale THERMOMETER within herringbone engraved surround, the trunk with visible tube over pagoda-shaped cistern cover enclosing syphon bulb and with cavetto moulded underside, (hygrometer incomplete, Vernier slide lacking), 93cm (36.5ins) high. J. Hogben of Rye does not appear to be recorded in the usual sources however a Thomas Hogben is recorded in Loomes, Brian Watchmakers and Clockmakers of the World, Volume 2 as working in nearby Smarden, Kent, 1740-92. The form of the current lot appears to be based on Benjamin Martin’s ‘Triple Weather Glass’ developed in London during the middle years of the 18th century.
A German oxidised and lacquered brass theodolite Dennert and Pape, Hamburg, late 19th century The telescope with rack and pinion focus adjustment and fitted with a spirit level to top, mounted via a horizontal pivot with fine screw angle adjustment bar to the one side onto two pieced A-frame uprights over rotating table incorporating central bubble-level to upper surface, the spaotted lacquered brass canted rim with two opposing windows for viewing the horizontal silver Vernier scale each equipped with individual pivoted magnification lens and signed Dennert & Pape, Hamburg =Altona and numbered St., 1505 between, the circumference with fine screw adjustment and knurled scale locking screw, the whole raised on column upright issuing triform radial supports with screw feet, in original oak and pine box with hinged carrying handle to top, The box 46cm, (18ins) high. Dennert and Pape were founded in 1848 and worked from Altona district of Hamburg well into the 20th century.
A pair of mahogany bow fronted cased stick barometer and thermometer of early 19th Century design, in the manner of J. Smith, North Gate, Royal Exchange, London, the barometer with engraved silvered scale and vernier, the thermometer with mercury tube and engraved silvered scale, both contained in figured mahogany veneered bow fronted case, bowed glazed panels below moulded scroll pediments, with split turned vase pattern cistern covers, both 39ins high Note: A James Smith was recorded working Royal Exchange, London, fl. 1817-1828
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
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.
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![Ø A 10½IN. RADIUS VERNIER OCTANT BY CRIHTON [SIC], LONDON FOR A. DOBBIE, GLASGOW, CIRCA 1850 the ebony T-frame with inset ivo](https://cdn.globalauctionplatform.com/d68cb778-e62a-4066-a647-aae200ad3815/26b80a04-0724-4a62-83ac-aae20105b3e1/468x382.jpg)
