
Circular aneroid barometer.
1876
Aneroid barometer with the works exposed, in mahogany frame, invented by Lucien Vidie, and made by R. Deutschbein, Hamburg, Germany, 1876

Micro-spectroscope with bright point micrometer with adapter tube by John Browning
1885-1888
Micro-spectroscope with bright point micrometer with adapter tube by John Browning, London, England, c. 1888.

Single shooting lens with hat attachment
1825-1875
Single corrective lens in tortoisesheel frame with adjustable mount and threaded bolt, for attachment to a hat or cap, for use when shooting a gun, unsigned, European, 1825-1875.

Steel rimmed tinted spectacles
1800-1850
Pair of blued steel rimmed spectacles, D-shaped tinted lenses with extra folding lenses and folding arms, unsigned, European, 1800-1850

300- foot tape measure, 1928
1928
300 foot steel measuring tape on reel, by Chesterman of Sheffield, England, 1928.

Pair of steel wire framed protective goggles
1838-1850
Pair of steel wire framed protective goggles, without glass, fitted with wire mesh side panels, felt padding and loop arms, unsigned, English, 1838-1850. Supplied by C. W. Dixey and Son, London, England.

Vertical Steam Engine, 1891
1891
14 hp vertical, single-cylinder, Marshall Steam Engine (made by Messrs. Marshall of Gainsborough, for Imperial Institute in 1891 and transferred to Kew Gardens in 1903)

Pivot folding spectacles
Pivot folding spectacles with round lenses in a blued-steel frame.

Bifocal spectacles frames
1840-1860
Pair of bifocal spectacles (lenses missing), with a pair of extra pivoting lenses frames, blue steel frames, unsigned, European, 1840-1860.

Steel rimmed spectacles
1800-1870
Pair of blued steel rimmed half-moon spectacles, D-shaped lenses and folding arms with loops, unsigned, Europe, 1800-1870.
Facsimile of Colt Navy Revolver
Facsimile of Colt Navy revolver, serial no. 7581, barrel length 218 mm / 8.6 in and calibre 9 mm / 0.4 in
Horizontal Steam Engine with Corliss Valve Gear, 1899
1899
Working model of a steam engine fitted with Corliss Valve Gear, 1899 with electric motor, in glazed case, scale 1:12.
Stage Tweezers for Cuff Microscope, Dollond, London
1751-1800
Stage tweezers, for use with Cuff microscope, by Dollond, London, 1750-1800.