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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
Pt100 platinum resistance temperature sensor element type FKG, made by W. C. Heraeus GmbH, Germany, 1994.

Platinum Resistance Temperature Sensor, 1994

1994
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
Paper knife made by F.H.Wollaston from a mass of platinum worked by William Hyde Wollaston

platinum paper knife

Date unknown
`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
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
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
Bate's gravimeter, with seven brass and four platinum weights in ivory box, in mahogany case, 6 1/2" x 2 1/8" x 2 1/2", c. 1830-5

Bate's gravimeter, c. 1830-5

circa 1830-5
Engineer's transit theodolite, 6.5-inch, by W. & L.E. Gurley, Troy, NY, United States, 1911-1920. Fitted with Burt type solar attachment and accessories.

Transit theodolite, American, 1911-1920

1911-1920
Platinum electro-deposited on copper. By Messrs. Johnson, Matthey and Co., 1885

Platinum electro-deposited on copper. By Messrs. Johnson

1885
Miniaturised platinum resistance temperature sensor, one of three (E10-005, 80 PF 4F, E13050), by Rosemount Engineering Company Limited, Minneapolis, Minnesota, United States, 1975-78.

Platinum Resistance Temperature Sensor, 1975-78

1975-1978
Miniaturised platinum resistance temperature sensor, one of three (E10-005, 80 PF 4F, E13050), by Rosemount Engineering Company Limited, Minneapolis, Minnesota, United States, 1975-78.

Platinum Resistance Temperature Sensor, 1975-78

1975-1978
Platinum crucible

Platinum crucible

Platinum stopper and delivery tube from Iridis platinum apparatus (1.420 oz.)

Stopper and delivery tube from Iridis platinum apparatus

Cylindrical Pt100 platinum resistance temperature sensor, element type number PR1615, made by RTD Products (a division of Thermocouple Instruments Ltd), England, 1994.

Platinum Resistance Temperature Sensor, 1994

1994