Revolution and Speed indicator, Mk. IV. Fitted to Casella Instrument Board Revolution and Speed indicator
Bent-stem earth thermometer by C.F. Casella and Co. Ltd, c. 1925. Bent-stem earth thermometer by C.F. Casella and Co. Ltd 1925
Earth thermometer, maximum and minimum, mercury and alcohol-in-glass, fahrenheit, tube bent 8 inches above bulb. Made by C.F. Casella and Co. Ltd, London. Marked MO 18203, 8974 and NPL25 certified in 1925. Min scale 20 to 125, max scale 15 to 100 Earth thermometer
Minimum thermometer, spirit-in-glass, sheathed, degrees absolute, by C F Casella & Co Ltd, London. Marked MO5, KO with handwritten label "Constantly getting out of order Jan 26/17" . Scale 240 to 310. Dated 1917 Minimum thermometer 1917
Frame for whirling psychrometer, by Casella, London. Used by Home Office Scientific Advisory Branch. Frame for whirling psychrometer 1920-1940
Three packets of hygrometer wicks, T8568/2, T8750/1, T6420/1, C 1966 Three packets of hygrometer wicks [1966]
Field Meteorology Set, Mark III, by C.F. Casella and Co. Ltd, in carrying case, 1942. With calibration charts, tables for logarithms and relative humidity, and a 1942 Observer's Handbook. Field Meteorology Set 1942
Selection of components from the three prism Oxford Solar Spectroscope made by Casella Limited with optical components from Adam Hilger Ltd. for the University Observatory, Oxford in 1938. Parts include two large 60 ยบ prisms, one prism stand and the collimator objective lens. Selection of components from the three prism Oxford Solar Spectroscope made by Casella Limited 1938
Electric cup anemometer and portable receiver, 1924, M.O. pattern. Electric cup anemometer and portable receiver 1924
Mercury manometer precision barometer 41/62, no. 141, by C.F. Casella and Co. Ltd, London, England, 1962. C.F. Casella and Co. Ltd Manometer precision barometer, 1962 1962