Set of 19 standard apothecaries weights by De Grave Short and Co. London, in fitted mahogany case inscribed on lid "WEST RIDING OF YORKSHIRE 1880". 10oz tr. 8oz tr. 6oz tr. 4oz tr. 2oz tr. 1oz tr. 3iv. 3ij. 3i. 3ij 3ts 3i (3ts missing) in brass; 6gm. 5gm. 4gm. 3gm. 2gm. 1gm. 1/2gm. in platinum Set of nineteen standard apothecaries' weights 1879-1880
Box containing metal wires and working notes made by William Hyde Wollaston. Also conrtains correspondence detailing the history of the objects. Box containing metal wires and working notes made by William Hyde Wollaston 1800-1815
Double sounding quintant invented by Rear-Admiral Frederick Beechey, and made by William Cary, London, about 1847. Anodized brass frame, polished brass limb, a circular brass handle. Signed on the limb: Cary, London. Marked on the limb: Da.96. Inlaid silver scale with two graduations, the lower from the left from -35° to 165° every 30', measuring to 145°; the upper, from the right, from -15° to 155°, measuring to 158°. Two silver verniers to 1'; zero at the left (lower) and at the right (upper). The lower tangent screw and clamping screw are on the back of the index arm, which is on the back of the frame; the upper tangent screw is on the back of the index arm, the clamping screw is on the front. No shades. Two index glasses, adjustment by screws, one horizon glass with two silvered portions and clear glass in between; adjustment by a screw and a capstan screw. Threaded telescope bracket; perpendicular adjustment by rising-piece. Telescope (70 mm) erect image. No box. Double sounding quintant. 1845-1850
Platinum wire. Presented by Mr. Charles, late assistant at the Royal Artillery Institute Platinum wire before 1889
Gold deposited on platinum, making a superficial alloy. Prepared by Messrs, Johnson, Matthey, and Co., 1885 Gold deposited on platinum, making superficial alloy before 1889
Platinum electrical resistance thermometer (pyrometer), laboratory pattern, with porcelain tube and fitted with glass tube, by The Cambridge Scientific Instrument Company Limited, Cambridge, England, 1910-14. Platinum Electrical Resistance Thermometer, 1910-14 1910-1914
Etchings with muslin ground (before 1852). Steel photoglyphic plate - fern leaf, 5" x 8", with proof. Platinum visible in leaves. Fern Leaf 1852
Pt100 platinum resistance temperature sensor element type FKG, made by W. C. Heraeus GmbH, Germany, 1994. Platinum Resistance Temperature Sensor, 1994 1994
`Uni-curve' interchangeable curve-matched bead, temperature sensor, type UUA41J1, resistance 10,000 ohms at 25°C, made by Fenwal Electronics Limited, 1994 Platinum Resistance Temperature Sensor, 1994. 1994
Four-stroke Diamler marine engine with frictional clutch and reverse gear, on wood stand, by Diamler Motor Co. Ltd., Coventry, c.1898 Two cylinder dainler engine for marine work 1898
Platinum rhodium thermocouple with one fireclay sheath, by Cambridge Instrument Company Limited, London, England, 1925-29. Platinum Rhodium Thermocouple, 1925-29 1925-1929
Air temperature grids, one of three, used by by Hugh Longbourne Callendar, England, 1886-1930. Air Temperature Grid, 1886-1930 1886-1930