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GOOD ENGLISH REFRACTING LIBRARY TELESCOPE BY Wm HARRIS LONDON

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~RAILWAYANA INTEREST-EXPANSION THERMOMETER-BRITISH RAILWAYS~

A fine 6 inch copper and mercury thermometer by Negretti and Zambra c. 1930. Used to gap rails according to ambient temperature during installation, this highly conductive device measures in degrees Fahrenheit and measures expansion from 0 to 3/8 inches. Fine overall condition noting one knock near the top right. British Railways issue. Case measures 15.5 x 5.5 x 2.5 cm. Read More...

18th century theodolite by Hart, Birmingham of large size

A finely made 18th century surveyors theodolite retaining the original lacquer to the brass and with well engraved compass rose, signed twice on the compass and below the telescope, Hart fecit Birmingham. The telescope is 18″ long   Read More...

HUGHES IMPROVED DOUBLE SEXTANT

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Hurter and Driffield Actinograph

An example of Hurter and Driffield’s Actinograph-Patent No.5545 1888, in good condition in original case, noting paper on large drum looks like a replacement. Read More...

Geologist Scale by Griffin and Tatlock

Geologist’s field scale for rock measurements by Griffin and Tatlock, complete and in good condition in original case Read More...

FINE ENGLISH EXPEDITION REFRACTING TELESCOPE BY ROBERT BANKS

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~FINE 1 3/4 INCH LEATHER BOUND THREE DRAW TELESCOPE-DOLLOND~

A fine 1 3/4 inch diameter, three draw telescope by Dollond c. 1840. Wonderful script signature “Dollond, London” on the first draw, early machining of all three draws, green flint/crown doublet object lens, clear optics, 10-20X magnification, object and ocular lens covers, tan leather body covering with intact stitching. Has seen little use (minor oxidation but nice and tight) and no dents to the draws or barrel. Leather military/naval style carrying sleeve has lost it’s strap. 10 inches closed, Read More...

C1895 John Weiss & Son Ltd Letter Opener

 A late 19th-century “JOHN WEISS & SON LTD”  advertising letter opener. Probably offered as a good- will gift to their regular customers. Weiss moved to 287 Oxford St, London, in 1889.They subsequently relocated to 11 Wigmore St. They are currently based in Milton Keynes.  Read More...

McDermotts Screw Propeller Computer

A cardboard Calculator with directions for operating in original leather case Read More...

Clarks computer for Conversion of the decimal parts of an Acre

A celluloid ready reckoner for conversion of the decimal parts of an acre into rods and perches and into square yards or vice versa Read More...

Recording copper rain gauge by Casella of London

An 8″ diameter recording copper rain gauge by C F Casella & Co of London. Circa 1950. With an internal 24 hour “Gluck” barometer recorder. Height: 63 cm. Diameter: 28 cm.   Literature: Casella London Catalogue No. 684 METEOROLOGICAL AND SCIENTIFIC INSTRUMENTS. Pages: 120 – 122.   Read More...