We found 1583 price guide item(s) matching your search

Scientific instruments to include Philip Harris Limited of Birmingham ohm gauge, kilowatt gauge, gas multimeter, etc.

Scientific instruments. A portable DC potentiometer, Croydon Precision Instrument Co, Type P3, No 13234, mid 20th c, in built-in teak case with leather case, 49.5cm l Practically as new and perhaps never used. Exterior of case - mainly the lid scratched

Scientific instruments. An English compound microscope, W Watson & Sons Ltd London, "Kima", No 65494, second quarter 20th c, fitted light oak case with label dated 1938 Instrument in good condition

Philip Harris Ltd., Birmingham Wimshurst Machine electrostatic generator on mahogany base, H27cm; another Wimshurst Machine; other scientific instruments and Andante Holdings Ltd., Orrery - Antikythera Mechanism (3)

A Philips Harris Birmingham light wood wall cabinet for scientific instruments, glazed front and sides, with key and inset factory label, 132x23x21cmx, along with a similar light oak cabinet white glazed front sides 144x14x13.5cms, and two small Remplay wooden framed cabinets with glazed door and internal shelves 45x36x14Location

An early 19th century shagreen tapered rectangular draughtsman's etui, hinged cover enclosing an arrangement of drawing and scientific instruments, push-button clasp, 17cm long

A collection of scientific optical instruments and construments

Apollo 15 moonwalker Dave Scott and CMP Alfred Worden signed Space cover NASA Astronauts. 2002 30th Anniversary Apollo 15. postmarked cover. Superb illustration on front of scenes from the mission. Also illustrated on back with crew names and mission information. David Randolph Scott (born June 6, 1932) is an American retired test pilot and NASA astronaut who was the seventh person to walk on the Moon. Selected as part of the third group of astronauts in 1963, Scott flew to space three times and commanded Apollo 15, the fourth lunar landing; he is one of four surviving Moon walkers and the last surviving crew member of Apollo 15. Before becoming an astronaut, Scott graduated from the United States Military Academy at West Point and joined the Air Force. After serving as a fighter pilot in Europe, he graduated from the Air Force Experimental Test Pilot School (Class 62C) and the Aerospace Research Pilot School (Class IV). Scott retired from the Air Force in 1975 with the rank of colonel, and more than 5,600 hours of logged flying time. As an astronaut, Scott made his first flight into space as a pilot of the Gemini 8 mission, along with Neil Armstrong, in March 1966, spending just under eleven hours in low Earth orbit. He would have been the second American astronaut to walk in space had Gemini 8 not made an emergency abort. Scott then spent ten days in orbit in March 1969 as Command Module Pilot of Apollo 9, a mission that extensively tested the Apollo spacecraft, along with Commander James McDivitt and Lunar Module Pilot Rusty Schweickart. After backing up Apollo 12, Scott made his third and final flight into space as commander of the Apollo 15 mission, the fourth crewed lunar landing and the first J mission. Scott and James Irwin remained on the Moon for three days. Following their return to Earth, Scott and his crewmates fell from favour with NASA after it was disclosed that they had carried four hundred unauthorized postal covers to the Moon. After serving as director of NASA's Dryden Flight Research Center in California, Scott retired from the agency in 1977. Since then, he has worked on a number of space-related projects and served as a consultant for several films about the space program, including Apollo 13. Alfred Merrill Worden (February 7, 1932 - March 18, 2020) was an American test pilot, engineer and NASA astronaut who was the command module pilot for the Apollo 15 lunar mission in 1971. One of only 24 people to have flown to the Moon, he orbited it 74 times in the command module (CM) Endeavour. Worden was born in Michigan in 1932; he spent his early years living on farms and attended the University of Michigan for one year, before securing an appointment to the United States Military Academy at West Point, New York. Graduating in 1955, he elected to be commissioned in the United States Air Force, though he had no piloting experience. He proved adept at flying fighter planes, and honed his skills, becoming a test pilot before his selection as a Group 5 astronaut in 1966. He served on the support crew for Apollo 9 and the backup crew for Apollo 12 before his selection for the Apollo 15 crew in 1970, with David Scott as commander and James Irwin as lunar module pilot. After Apollo 15 reached lunar orbit, and his crewmates departed to land on the Moon, Worden spent three days alone in the CM, becoming in the process the individual who travelled the farthest from any other human being, a distinction he still holds. He took many photographs of the Moon and operated a suite of scientific instruments that probed the Moon. During Apollo 15's return flight to Earth, Worden performed an extravehicular activity (EVA), or spacewalk, to retrieve film cassettes from cameras on the exterior of the spacecraft. It was the first deep space EVA in history, and as of 2022 remains the one that has taken place farthest from Earth. After their return, the crew became involved in a controversy over postal covers they had taken to the Moon; they were reprimanded by NASA and did not fly in space again. Worden remained at NASA until 1975 at the Ames Research Center, then entered the private sector. He engaged in a variety of business activities and had a longtime involvement with the Astronaut Scholarship Foundation, serving as chair of its board of directors from 2005 until 2011. He made many public appearances, promoting a renewed space program and education in the sciences, before his death in 2020. Good condition. All autographs come with a Certificate of Authenticity. We combine postage on multiple winning lots and can ship worldwide. UK postage from £5.99, EU from £7.99, Rest of World from £9.99

Petite pendule dite 'aux sciences' en bronze doré de la fin du XVIIIe siècleLe cadran émaillé blanc à chiffres romains pour les heures est signé Lefebvre à Paris, il est posé sur une gaine cannelée et présente sur la base rectangulaire des instruments scientifiques. Base en marbre blanc.H. 29 cmA small late 18th century gilt bronze clockThe white enamelled dial with Roman numerals for the hours is signed Lefebvre in Paris. It stands on a fluted sheath and displays scientific instruments on the rectangular base. White marble base.For further information on this lot please visit Bonhams.com

A group of military and scientific instruments including pocket compasses, compass fobs, an Art Deco designed timepiece set with a military issued pocket watch, etc.

J Hicks - Hatton Garden London, - late 19th century carved oak cased Fitzroy barometer in a richly carved case with a carved crested pediment and square cistern cover, inverted opaline register reflecting FitzRoy's predictions and a scale from 27 to 31 inches of barometric pressure, with a thick bore cistern tube and adjustable rack and pinion twin vernier, fitted with a glazed snail bulb mercury thermometer recording the air temperature in both Fahrenheit and Celsius. Mercury clean and present.James Joseph Hicks was born in Ireland, however, early in his life he moved to London where he was apprenticed to the instrument maker Louis P Casella. In 1860 he went into business in his own right as a scientific instrument maker at 8 Hatton Gardens. In 1864 he was granted membership to the British Meteorological Society and exhibited instruments at the Royal Society Exhibitions between 1876 and 1913. Hicks was one of London's most prolific and eminent barometer makers. Dimensions: Height: 110cm Condition Report: The two vernier adjustment buttons are missing.

Mid 20th Century cased instruments, ivory bakalite cased weights, scientific lenses and telescope.

BECQUEREL HENRI: (1852-1908) French physicist and engineer, the first person to discover radioactivity. Nobel Prize winner for Physics, 1903. A good autograph manuscript, unsigned, incorporating several explanatory drawings, two pages (written to the first and fourth sides of the bifolium), n.p., n.d. (circa 1895), in French. Becquerel's manuscript is entitled Historique des machines, and particularly concerns direct current dynamo-electric machines, and was most likely prepared as an aide-memoire for one of his first physics courses at the Ecole Polytechnique in Paris. Becquerel has listed the names of various famous inventors alongside the dates of their discoveries and summary notes, several with explanatory scientific drawings alongside, including Faraday ('1831 Anneaux de fer......d'une bobine'; Translation: '1831 Iron rings......a coil'), Pixii ('En 1832......aimants dans un disque bois mobile devant des bobines'; Translation: 'In 1832......magnets in a moveable wooden disk in front of coils'), Ritchie ('bobines mobiles'; Translation: 'moving coils'), Clarke, Nollet, Siemens, Wilde ('aimants et electro aimants'; Translation: 'magnets and electro magnets'), Ladd, Pacinotti, Gramme, Varley, Wheatstone, Alteneck and Edison. To the foot of the first page appear various scientific equations and drawings in pencil, most crossed through. A good manuscript featuring the names of many inventors and physicists who inspired and influenced Becquerel. Some very light, extremely minor age wear, VGMichael Faraday (1791-1867) English scientist who contributed to the study of electromagnetism and electrochemistry.Hippolyte Pixii (1808-1835) French instrument maker who built an early form of alternating current electrical generator based on the principle of electromagnetic induction discovered by Faraday.Edward Samuel Ritchie (1814-1895) American inventor and physicist who made important contributions to science and navigation.Hyde Clarke (1815-1895) English engineer, philologist and author.Floris Nollet (1794-1853) Belgian physicist, engineer and inventor who designed plans for large-scale generators.Werner von Siemens (1816-1892) German electrical engineer, inventor and industrialist.Henry Wilde (1833-1919) English electrical engineer who invented the dynamo-electric machine.William Ladd (1815-1885) English manufacturer of microscopes and other scientific instruments including the Dynamo-Magneto-Electric machine (1867).Antonio Pacinotti (1841-1912) Italian physicist, best known for inventing an improved form of direct-current electrical generator (1860).Zenobe Gramme (1826-1901) Belgian electrical engineer, inventor of the Gramme machine, a type of direct current dynamo capable of generating smoother and much higher voltages than the dynamos known to that point (1871).C. F. Varley (1828-1883) English engineer particularly associated with the development of the electric telegraph and the transatlantic telegraph cable.Charles Wheatstone (1802-1875) English scientist and inventor who made many scientific breakthroughs during the Victorian era.Friedrich von Hefner-Alteneck (1845-1904) German electrical engineer, one of the closest aides of Werner von Siemens.Thomas Edison (1847-1931) American inventor of the electric light bulb among many other items.

A set of early 20th century Stanton Instruments Ltd - Morden, Surrey. Open cased brass balance scientific scales with manufacturers label to column stand. The scales being raised on slate base. Includes brass weights in a dovetailed teak box. Measures approx 25.5cm x 40cm x 34cm. 

Microscope, telescope and other scientific instruments

A teak cased scientific balance, Stanton Instruments Ltd. scales Model AD2, with sliding front access panel, 46 x 46 x 26cm

early 19th Cent. Empire style clock with its case in gilded bronze with a lady with all kinds of scientific instruments - with a work with cord suspension || Vroeg negentiende eeuwse Franse Empire-klok met kast in gedoreerde brons versierd met een vrouw bij allerlei wetenschappelijke instrumenten - met koordophanging - hoogte en breedte : 40,5 en 28 cm

A Collectors Lot Of Medical & Scientific Instruments, including a set of craniotomy forceps and other medical items, an anemometer, slide rules and other items ( a lot)

3 Scientific Instruments A Spherometer by Philip Harris, an opisometer, and a Dunlop Micrometer gauge by J. Holub, York

Classic Microscopy - The Beck Model 50 Microscope, English, c.1930, signed to the top 'MODEL 50 BECK LONDON' the microscope on large black enamelled support, with reflected light at the base via an angled mirror, focusing mechanical stage with focusing substage, vertical illuminator mounted to main frame with beck Apochromatic Stress Free Bloomed Objective Lens, with focusing interchangeabel binocular/monocular head, camera mount at top, (camera mount broken AF) Footnote: We have only been able to find a single other sale of a Beck Model 50 at auction: Christies, Sale No. 6175, Scientific Instruments,Tools and Apparatus, 1st July 1993 sold for £1320

Collection of Scientific Catalogues, including Philip Harris, Third Edition, Catalogue of Scientific Instruments, Physics, c.1930, Townsend & Mercer Ltd Cataogue of Chemical & Scientific Apparatus & Chemicals, 1927, Catalogue of General & Industrial Laboratory Apparatus, Chas Hearson, includes a good section on microscopes including the Watson No.1 Van Heurck, c.1930, and chemical Aparatus, Standley, Belcher & Mason c.1930

A GILT BRASS ANEROID POCKET WEATHER FORETELLER BOROMETER OR 'WEATHER WATCH'NEGRETTI AND ZAMBRA, LONDON, EARLY 20th CENTURYThe 2 inch circular silvered register calibrated in barometric inches to the circumference around an inner ring adjustable for DIRECTION OF WIND via the knurled bezel against annotations provided as compass bearings as well as DEAD CALM, the central disc rotated via a knurled crown within the suspension loop for lining-up the blued steel pointer against a scale with corrections for altitude, pierced with three sectors annotated FALL, STEADY and RISE revealing letter codes to the fixed plate behind, inscribed PATENT 6276/15 and signed NEGRETTI & ZAMBRA, the cylindrical case with altimeter scale to circumference to allow calibration of the instrument for a given altitude by turning the rear bezel align a pointer engraved into the rim, the rear cover is annotated with twenty-six sectors describing a weather forecast beside a letter of the alphabet which appear within the relevant sector to the centre of the register; with green-velvet lined maroon Morocco leather covered protective case fitted with ivorine repeat sector scale to the inside of the lid.The instrument 5.4cm (2.125ins) diameter, 2.3cm (0.625ins) deep; the outer case 6.5cm (2.25ins) diameter. 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. This design of pocket barometer incorporates Negretti & Zambra's Weather Forecaster (patented in 1915) which was developed using actual weather conditions over a ten year period. By setting the wind direction and lining up the central disc against the steel pointer on the dial, as well as allowing the correction for altitude (by rotating the rear cover so that the arrow lines up with the correct level on the scale engraved on the side of the case), the weather can be forecast by reading the letter that appears within the appropriate sector in the centre of the dial taking into account whether the pressure has been rising, falling or remaining steady and the season (summer or winter). Another example is Illustrated in Banfield, Edwin BAROMETERS Aneroid and Barographs on page 87, with a full description of its operation on page 89. Condition Report: Instrument is in working condition (will respond to change in pressure with a 'bag test'). It is currently reading on the high side so will require calibrating. The mechanical setting adjustments (bezel, rear cover and crown) are fully operational. he dial has some slight mellowing to the silvering but is free form visible defects. Case is almost pristine with minimal wear to the gilding. The protective case is also in very fine condition.Condition Report Disclaimer

A CASED SET OF ANEROID FORECASTING BAROMETER AND LACQUERED BRASS WEATHER FORECASTING CALCULATOR NEGRETTI AND ZAMBRA, LONDON, EARLY 20th CENTURY The barometer with 3.5 inch circular silvered register calibrated 28 - 31 divided into twentieths and inscribed FORECASTING ANEROID, COMPENSATED, NEGRETTI & ZAMBRA, LONDON, No. 9091 to centre, with blued steel pointer set behind bevel glass, the circumference of the frosted gilt brass case calibrated with altitude scale 0 - 3000 feet with the rear cover rotating to calibrate the pointer for altitude error by referencing an arrow mark engraved to the rim against the scale, with post incorporating knurled nut for locking the rear cover positioned at twelve o'clock; the weather forecasting calculator formed as three discs, the outer calibrated in inches for the barometer reading to the top edge and for the wind direction to the lower edge, the middle ring annotated for STEADY, RISING and FALLING incorporating selections for SUMMER or WINTER for lining up with the wind direction scale, the centre with instructions for use, sector revealing appropriate weather forecast and inscribed NEGRETTI & ZAMBRA, LONDON, PATENT 6276, 1915, with hinged strut to rear and suspension post; both contained in two-part hinged green velvet lined Morocco leather covered case.The barometer 9.8cm (3.875ins) diameter, 3cm (1.25ins) deep; the calculator 12cm (4.75ins) diameter; the box 14.5cm (5.75ins) wide, 15cm (6ins) deep, 7cm (2.75ins) high. The firm of Negretti & Zambra are recorded in Banfield, 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 forecasting calculator was patented by Negretti and Zambra in 1915 using observations of actual weather conditions over a ten year period and was said to be 80% accurate by the manufacturers. An identical example to that included in the current lot is illustrated in Banfield, Edwin BAROMETERS Aneroid and Barographs on page 81 and is fully described on page 82. 

A RARE LACQUERED BRASS TABLE WEATHER FORECASTING CALCULATORNEGRETTI AND ZAMBRA, LONDON, CIRCA 1915Formed as three discs, the outer calibrated in inches for the barometer reading to the top edge and for wind direction to the lower edge, the middle ring is inscribed STEADY, RISING and FALLING incorporating selections for SUMMER or WINTER for lining up with the wind direction scale, the centre with instructions for use, sector revealing appropriate weather forecast and inscribed NEGRETTI & ZAMBRA, LONDON, PATENT, 6276, 1915, the rear a graduated pair of twin knurled discs for adjusting the scales set beneath an bridge to centre and stamped 25 twice to rim; in original velvet lined canvas wallet type case with folded instruction pamphlet.The instrument 12cm (4.5ins) diameter. The firm of Negretti & Zambra are recorded in Banfield, 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.  An example this type of weather forecasting calculator is illustrated in Banfield, Edwin BAROMETERS Aneroid and Barographs on page 81 and is fully described on page 82. The design was patented by Negretti and Zambra in 1915 using actual weather observations over a ten year period and was said to be 80% accurate by the manufacturers. The present example utilises knurled discs set beneath a bridge to the rear to adjust the scales rather than the usual simple tab thumb pieces seen on other examples. This detail, together with the stamped number 25 to the rim, would suggest that it is a particularly early example (number 25) utilising a relatively complicated system for adjustment (from a production point of view) which was subsequently simplified for later models. 

A GEORGE V MAHOGANY CASED TWO-DAY MARINE CHRONOMETERTHOMAS MERCER, ST. ALBANS, RETAILED BY LILLEY AND SON, LONDON, CIRCA 1906The circular four pillar single chain fusee movement with Harrison's maintaining power, Earnshaw type spring detent escapement and split bimetallic balance with cylindrical compensating weights, helical balance spring and diamond endstone, the spotted backplate with spring set-up ratchet and blued-steel pillar and backcock securing screws, the reverse of the dial mounting plate stamped 7358, the 4 inch circular silvered Roman numeral dial with subsidiary seconds dial engraved with retailer's serial number 1660 beneath signature LILLEY & SON, 10. LONDON ST., LONDON. E.C. across the centre and DOWN/UP power reserve dial flanked by engraved red banners inscribed MAKERS TO THE, ADMIRALTY to upper section, with gold spade hands and secured by a screw-down bezel into a lacquered brass bowl with shuttered winding hole and engraved H.S.1 along with the M.O.D. arrow device to rear, mounted via gimbals into a brass-bound mahogany three-tier box with shaped brass vacant plate to the brass corner-capped top tier over second tier with glazed panel to interior, inset brass panel engraved TO R.C. MOORE ESQ., WITH THE APPRECIATION OF, HIS STAFF., 25th DECEMBER 1945 to front and brass reinforcements to angles, the bottom tier with conforming reinforcements and recessed side handles.19cm (7.5ins) high, 18.5cm (7.35ins) square. Provenance:Purchased at Bonhams, Knightsbridge, London sale of Clocks, Watches & Barometers 24th November 2009 (lot 276) for £2,340. The chronometer making firm Thomas Mercer of St. Albans was established by Thomas Mercer (1822-60) at North Road, London in 1858 before moving to 45 Spencer Street, Clerkenwell in 1860. Mercer became an active member of the British Horological Institute (established in 1858) where he lectured on the need to modernise the industry and served as honorary treasurer from 1875-95. After occupying several addresses in Clerkenwell Mercer relocated the core of the business to St. Albans in 1874 setting up a factory behind his house at 14-15 Prospect Road. Although the bulk of the businesses work was undertaken in St. Albans Mercer personally made weekly trips to Clerkenwell to deliver/collect parts finished by specialist outworkers as well as visit the Horological Institute.In order to maintain a presence in London Thomas Mercer opened an outlet 18 Westmoreland Road, City Road in 1890. Succuss at the Greenwich trials was also always considered important to Mercer who entered instruments every year; he was placed second in 1881 and his son, Frank, came first in 1911. In 1900 Thomas Mercer accepted an invitation to judge at the Universal Exhibition in Paris but unfortunately caught a cold on the ferry crossing and died soon after his return. The business was subsequently continued by his successors becoming of the most prolific suppliers of chronometers and other timepiece for industrial, maritime and domestic purposes and continued trading in St Albans until 1984. The firm of Lilley and Sons is recorded in Betts, Jonathan MARINE CHRONOMETERS AT GREENWICH as being traced back to the scientific and nautical instrument maker, John Lilley, who was apprenticed to Michael Dancer in 1801. By 1811 Lilley had established his own business in Hatton Garden and then from various successive addresses. He was joined by his son of the same name in around 1845, at that time the firm was based at Jamaica Terrace, Commercial Road, London. On his father's death in 1859 John Junior took-over the business who was subsequently succeeded by his second son, George Charles Lilley, by 1881. From 1865 the business was trading from London Street, Fenchurch Street, London and in 1903/4 to 1906/7 they took part in chronometer trials with the best result being for no. 1590 which came fourth in 1905/6. In 1911 John Wilson Gillie joined as a partner and the business became John Lilley & Son Ltd and, despite several changes in ownership, was still trading at the start of the 21st century as Lillie and Gillie based in North Shields. The present lot (serial number 7358) is noted in Mercer, Tony Mercer Chronometers - Radical Tom Mercer and the House he Founded as supplied by the firm direct to Lilley & Son. The M.O.D. HS1 stamps indicate the current chronometer was classified as 'a chronometer with spring detent escapement' by the Ministry and records show that it was loaned to the Royal Navy during World War II, before being returned to its owner towards the end of 1944.   Condition Report: Movement is in fine clean working condition having been recently serviced. There is no visible evidence of alteration or noticeable replacements. The dial is in good clean condition with faults limited to some slight patchy degradation to the protective lacquer for the silvering. The bowl, gimbals and other internal brass fittings all appear original retaining old tinted lacquer finish with historic crazing, wear/rubbing and light flaking. The box is in fine condition having recently being carefully polished/freshened-up in a manner as to retain old finish with the only noticeable fault being a small historic bruise to the top surface.Timepiece is complete with a typsy winding key (a replacement) and a case key.Condition Report Disclaimer

A GILT BRASS ANEROID FORECASTING BAROMETER NEGRETTI AND ZAMBRA, LONDON, EARLY 20th CENTURY The barometer with 3.5 inch circular silvered register calibrated 28 - 31 divided into twentieths and inscribed FORECASTING ANEROID, COMPENSATED, NEGRETTI & ZAMBRA, LONDON, No. 9437 to centre, with blued steel pointer set behind bevel glass, the circumference of the frosted gilt brass case calibrated with altitude scale 0 - 3000 feet with the rear cover rotating to calibrate the pointer for altitude error by referencing an arrow mark engraved to the rim against the scale, with post incorporating knurled nut for locking the rear cover positioned at twelve o'clock; in original circular hinged maroon Marocco leather covered protective case. The barometer 9.8cm (3.875ins) diameter, 3cm (1.25ins) deep; the case 11.5cm diameter, 4.5cm (1.75ins) deep. The firm of Negretti & Zambra are recorded in Banfield, 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.  

First World War period compass by Negretti & Zambra of military type, stamped to reverse, with locking mechanism, the dial 3.2 cm diam. Inscribed " C J Lane Leicester Museum" to inside of cover. Condition Report Surface wear, marks and scratches throughout. Losses to decal on glass. All scientific instruments are sold untested for accuracy in measurement. Unfortunately we do not have a verifiably calibrated compass for comparison. The compass seems to consistently face the same direction and return to that direction when turned.

German 'Original Bezard' 1940s pocket compass in military style case and a U.S. military issue magnetic compass by Stocker & Yale Inc., stamped NSN 6605-01-196-6971, dated 13 Nov 86 Condition Report Surface wear and scratches throughout cases. Some loss to paint. Some rust ot the internal cover of the german compass. Both have wear and fogging to the glass. Alll scientific instruments are sold as untested for accuracy in meassurement. Unfortunately we do not have a verifiably calibrated compass for comparison. Both seem to consistently face a simliar direction and return to that direction when turned.

Two WWII military issue marching compasses by T.G. Co.Ltd (London), the first No. B271945, MK 1, 1944, MILS, numbered 6605-99-960-0789 and a Magnetic Marching compass, Mark 1, numbered B153459, both with arrow mark (2) Condition Report Both have surface wear and scratches throughout. Lacquer/paint is especially worn to the top of the Mils MK1. All scientific instruments are sold as untested for accuracy in measurement. Unfortanetly we do not have a verifiably calibrated compass for comparison. Both consistently face a simliar direction and return to that direction when turned.

FIVE BOXES OF BOOKS containing over 105 miscellaneous titles in hardback format, mostly of an encyclopedic nature, subjects include Practical Engineering, The Amateur Mechanic, The Modern Practical Plumber, The Journal Of Scientific Instruments, Modern Electrical Practice, Practical Electrical Engineering and other scientific works

SIX BOXES OF SCIENTIFIC INSTRUMENT BOOKS, to include Review of Scientific Instruments and Journal of Scientific Instruments, to cover years from the 1930s to 1970s, stamped to the inside for Radio Research Library, Slough

Frankreich - Versilberte Bronzemedaille o.J., Auf die Wissenschaft, von Louis-Alexandre Bottée, Av: DUX ET LUX, sign.: Louis Bottée, Die Personifikation der Wissenschaften sitzt zwischen wissenschaftlichen Instrumenten, neben ihr Genius mit Schild, Rv: A LA SCIENCE, sign.: Louis Bottée, Darstellung der Sphinx mit Spiegel, Gravurfeld frei, Rand: Punzierungen "Füllhorn" / "BRONZE", vz-stgl., mattiert gearbeitet, Kratzer, Tönung, leicht berieben, ca. 58,3 g. Bottée, Louis-Alexandre (1852 - 1940), ein französischer Medailleur, war ab 1871 Student an der École nationale supérieure des beaux-arts in Paris. Bottée erhielt für seine Arbeiten zahlreiche Auszeichnungen und wurde 1930 Mitglied der Akademie der Bildenden Künste in Paris. | France - Silver-plated bronze medal n.d., On science, by Louis-Alexandre Bottée, Av: DUX ET LUX, signed: Louis Bottée, The personification of science sitting between scientific instruments, next to her genius with shield, Rv: A LA SCIENCE, signed: Louis Bottée, depiction of the sphinx with mirror, free engraving field, rim: hallmarks "Füllhorn" / "BRONZE", EF-BU, scratches, toning, slightly rubbed, approx. 58.3 g. Bottée, Louis-Alexandre (1852 - 1940), a French medalist, was a student at the École nationale supérieure des beaux-arts in Paris from 1871. Bottée received numerous awards for his work and became a member of the Academy of Fine Arts in Paris in 1930.

An early 20th century Carl Zeiss Jena Theodolite in fitted wooden case and two cased scientific instruments

Period Wooden Cased Scientific Instruments Gauges, an Amperes by Elliott, Glavonometer by H Tinsley Co, Microamperes Gambrell (3)

Collection of 19th Century and early 20th Century cable samples along with other scientific instruments, corkscrews etc.

Scientific instruments, wall bells and other items.

Medical. Petit (Jean-Louis), A Treatise of the Diseases of the Bones; Containing an Exact and Compleat (sic) Accounts of the Nature, Signs, Causes and Cures thereof, in all their various Kinds [...], first English edition, London: Printed for T. Woodward, 1726, xvi, 490, [6] (contents & publisher's advert), in-text illustrations, generally of medical and scientific instruments, a few anatomical and skeletal,  in-keeping 20th c half-calf over marbled boards, 8vo Provenance: 1) Justinian Morse (1691-1752), recorded as an organ builder in Barnet, London; title-page with his ink MS ownership inscription dated 1726. 2) The library of Roger Tilston Austin, consultant orthopaedic and trauma surgeon; later Honorary Librarian of the Leicester Medical Society and its President (2002).

3 scientific measuring instruments incl. 2 in walnut box, largest 18 cm high

3 scientific measuring instruments in walnut boxes, largest 25 cm wide

2 Cased Scientific instruments inc. W H Rees Stimulator, Airsonic and a Neo Cyclostyle printing duplicator

Optical and Scientific instruments, early 20th century 3 draw brass pocket telescope, Pilot Telemag British Made in its card cover, (Optics clear)

Maritime, navigation – Seller (John, 1632-1697, Hydrographer to the King), Practical Navigation, or, an Introduction to the Whole Art, Dublin, S. Powell, 1715 small 8vo, (v) + 272pp, various diagrams, bound with, A Table of Logarithms, with a Table of Artificial Sines, Tangents and Secants, the Radius 10,0000000 [sic] and to every Degree and Minute of the Quadrant, Dublin, George Grierson 1725, MS inscription over the main title page of John Seller’s book, overwritten ‘Bought by Matt. Scott of Mr. Grierson in Dublin July 26th 1739 5s 5d’, further inscribed on first title page ‘John Guine 22nd July 1809’, calculations on front pastedown, the rear including part of a letter headed from an Irish address, bound blind calf, untitled, rear board slightly spotted, contents remarkably good (1) ***John Seller was the son of a London haberdasher, and was later a Merchant Venturer, becoming one of the most important men in the early history of the atlas trade in England He also traded in scientific instruments, notably compasses, at his shop in Wapping, published his first version of Praxis Nautica: Practical Navigation in 1669. He was made Hydrographer to the King in 1671 and published several other guides, charts and maps, dying in 1697. ‘Matt. Scott’ may perhaps be identifiable with Matthew Scott (1698-1758) of Convoy, Co. Donegal, a kinsman of the Earl of Tarras

Assorted scientific instruments including a Crosby indicator steam engine spring tester, boxed, a Vulcan test gauge, boxed, a Crosby Steam Gauge and Valve Company stainless steel pressure tester gauge and an early brass electric time switch in glass-topped case (4)  Condition Report Box sizes: 12x23x17cm, 11.5x20x18cm, 9.5x14.5x11.5cm and 12.5x22.5x17.5cmTotal weight approx 9.5kg

A pair of classical style spelter figures, a/f, vintage coat hooks, elm and steel hanging rack and assorted cased scientific instruments

Scientific Instruments, a brass Troughton & Simms ruling rule, 31cm long

Collection of scientific equipment with lenses, cased instruments, volt machines, cameras, bulbs, mixing glasses, measuring glasses etc.

A FRENCH EMPIRE STYLE ORMOLU MANTLE CLOCKEarly 19th Century The white dial flanked by allegorical winged figures, the base with applied scientific instruments, books and a cockerel amongst leaves, the case surmounted by a winged cherub leaning on a blue globe, count wheel strike on bell, 43cm highProvenance: A House on Belgrave Square - Part I  See Bellmans website article for further details.

Scientific Instruments - a set of laboratory balance scales, A. Gallenkamp & Co., Ltd., with brass weights, cased, 34.5cm high; a Sir Hiram Maxim's Pipe of Peace and Maxim Inhaler, boxed, c.1910; dairy thermometers; etc, qty

Cased General Science and Light Educational set containing various scientific instruments and accessories.(B.P. 21% + VAT)

A Group of Scientific Books, The Microscopic Photographs of J.B. Dancer by Brian Bracegirdle & James B McCormick, A Victorian World of Science by Alan Sutton, A Dictionary of Named Effects and Laws by D.W.G. Ballentyne & L.E.Q Walker, A Treatise on Meteorological Instruments by Nagretti & Zambra, The Book of the Sextant (2) by A.J. Hughes and other literature

CORNELIUS VARLEY (BRITISH 1781-1873) VIEW OF SNOWDON AND CAPEL CURIG, NORTH WALESsigned and dated Cornelius Varley 1866 lower leftwatercolour on paper 17.5 x 25cm; 6 3/4 x 9 3/4in41.5 x 48cm; 16 1/4 x 19in (framed)Property from a Private Collection ProvenanceSpink-Leger, London Purchased from the above by the present owners in March 2000ExhibitedLondon, Spink-Leger, Feeling through the eye, 2000, no. 93 Initially educated by his uncle in the natural sciences, Cornelius Varley began to develop as an artist around 1800, when he accompanied his older brother, watercolourist John Varley (1778-1842), on a tour of Wales. During his career he depicted many Welsh landscapes such as this one as well as classical scenes and views of the Thames. Varley was also an inventor of scientific instruments, notably the graphic telescope which he exhibited at the Great Exhibition of 1851.

Scientific Instruments, I.P Cutts, London, a 19th Century gentlemans' library telescope, brushed brass, lens cap, two additional lenses including astronomical eyepiece, with accompanying table-top tripod stand with 'C' scroll retractable feet, length fully extended 108cm, in a fitted mahogany case

A COLLECTION OF SCIENTIFIC GLASS WARE AND OBSTETRIC INSTRUMENTS

A metal deeds box, pen set, cased scientific instruments, a Sharpe UX108 fax machine, Fujicam camera, table lamp, etc. (1 tray and loose)

DOLOMIEU DEODAT GRATET DE: (1750-1801) French geologist after whom the mineral and the rock dolomite were named. A supporter of Napoleon Bonaparte during the French Revolution, Dolomieu was captured and held as a prisoner of war in Italy from 1799. Following Napoleon's successful invasion of Italy, one of the terms dictated by him in the peace treaty of Florence in March 1801 was the immediate release of Dolomieu. An extremely rare autograph manuscript signed, with his initials G D D, two pages, 12mo (6.5 x 9.5 cm), n.p., n.d., in French. Dolomieu's manuscript notes, comprising thirty-seven lines written in a small, although perfectly legible, hand is entitled 'Les Erreurs reconnues sont des verites acquises' (Translation: 'The errors recognised are the truths acquired') and states, in part, 'et leur decouverte est d'autant plus utile qu'elles ont été de nature à séduire beaucoup de gens. Les erreurs vécues empechent l'esprit de s'occuper de nouvelles recherches: on croit savoir et c'est le plus grand obstacle a savoir reellement…….La verite recherchee par les hommes est comme le feu qu'ils produisent avec des matieres combustibles; plus elle s'etend, plus elle a de tendance a s'etendre de nouveau. On fait un pas vers la decouverte de la cause d'un phenomene quelconque lorsque l'on trouve que les causes auxquelles on l´attribuait n'ont aucun rapport avec lui. Comme il n'y a point d'effets sans causes, lorsqu'on decouvre un plus grand nombre de faits qui, quoique contemporain d'un phenomene, n'ont point de rapports avec lui, on se rapproche de la connaissance de la cause qui pourra l'expliquer. Cette methode d'approche de la verite, qu'on peut dire negative et d'exclusion peut reussir finalement quoiqu'elle puisse etre longue. Mais elle est essentielle a employer surtout dans les recherches geologiques' (Translation: 'and their discovery is all the more useful in that they have been of a nature to seduce many people. Errors experienced prevent the mind from dealing with new research: we think we know and this is the greatest obstacle to really knowing…….The truth sought by men is like the fire they produce with combustible materials; the more it expands, the more it tends to expand again. One takes a step toward discovering the cause of any phenomenon when one finds that the causes to which it was attributed have no connection with it. As there are no effects without causes, when we discover a greater number of facts which, although contemporaneous with a phenomenon, have no connection with it, we come closer to knowing the cause that can explain it. This method of approaching the truth, which can be said to be negative and of exclusion, can ultimately succeed, although it may take a long time. But it is essential to use especially in geological research'). An interesting and important text. Some very light, minor foxing and age wear, otherwise VG The text of Dolomieu's manuscript originates from a scientific work published in 1778-79 by Jean-Andre Deluc (1727-1817) Swiss geologist, natural philosopher and meteorologist who devised measuring instruments. Deluc's father was a supporter of Jean-Jacques Rousseau and Jean-Andre also wrote of conversations he had experienced with Voltaire and Rousseau in an essay on the General Principle of Mortality which he had published in 1798.

Collection of Drawing Instruments, comprising of a large brass 'diagonal scale' signed 'STANLEY LONDON' in a fitted French polished mahogany case, the scale engraved with 24 inches along the top edge, case length 80cm, the case with a brass label for D.S.I.R. - Department of Scientific and Industrial Research, was a department of the British Government responsible for the organisation, development, and encouragement of scientific and industrial research at the begining of the 20th Century; a large German set of nickel plated scale rules in a fitted wooden case with a plaque for 'GEBR WICHMANN BERLIN N.W.6, KARLSTR 13', case length 60cm; and an 18" rolling rule in a French polished mahogany case (x3)

Large Folio Print of Robert Boyle, large period folio print of Robert Boyle with 2 pages of text, the engraving titled at the bottom 'Geo. Vertue del & Sculpt, 1739, IN the collection of Dr. Mead, Inpenfis J & P Knapton, London 1740, J Kerfseboom, print' the portrait of Boyle surrounded by various scientific instruments and flasks, Robert Boyle FRS was an Anglo-Irish natural philosopher, chemist, physicist, alchemist, and inventor. He is widely recognized as a prominent figure in the history of science. Boyle's contributions position him as a key pioneer of modern chemistry and a foundational figure in the advancement of modern experimental scientific methodologies.

Scientific interest, Guangzhou Liss Optical Instruments L201 Tri way Laboratory Microscope approximately 35cm high

Scientific instruments to include a compass, a miniature sextant, and an astronomical quadrant and compass, and two other compasses Location:

Cambridge Scientific Instruments Co clinometer, flintlock tinder lighter, and a Anders Mattson Mora patent bobbin winder (3)