Bibby recorder Mark II, Met Ref No 985, MO 22/51, demonstration model, with perspex cover Meteorology 1951
Aircraft radio telephony transmitter, complete with round valve and microphone, 1915 Radio Communication 1915
Siphon recorder, designed by William Thomson (Baron Kelvin) made by James White & Company, Glasgow, Scotland, 1870. Used by the Eastern Telegraph Co in Egypt, and later in India Siphon recorder, 1870 Telecommunications 1870
Sterling spark transmitter, No. 1, by W. D. Wireless Factory, Soho, London, England, 1915-1918. The Sterling tuned spark gap wireless transmitter operated on the frequency range of 100-260 metres. The transmitter's output of 30-40 Watts fed to the 120 feet of trailing aerial gave it an operating range of 8-10 miles. The set was usually mounted on a tray on the side of the aircraft fuselage. The trailing aerial of stranded copper wire with a 3Ib weight on the end was spooled out either from the side of aircraft fuselage alongside the wireless set or through an insulated gland in the floor. Sterling spark transmitter, No. 1, 1915-1918. Radio Communication 1915-1918
Marconiphone Model 701 dual-standard (240/405 line) television receiver with built-in radio, 1936. Marconiphone Model 701 television receiver Television 1936
Periscopic bubble aircraft sextant, Type 1A, No. 2053, by Kelvin and Hughes (Aviation) Limited, Barkingside, Essex, England, 1950-1951. The periscopic bubble aircraft sextant was used on the De-Havilland Comet passenger jet aircraft. Periscopic bubble aircraft sextant: Type 1A, No. 2053 Navigation 1950-1951
Tall radiosonde, improbably described as a rocket sonde (insufficiently robust) Tall radiosonde Meteorology 1959
Linear gate and integrator (counter), in an equipment shelf, containing five units, including three summing amplifiers, one particle identifier and a counting unit. Equipment shelf by Fleming Instruments Limited, Stevenage, Hertfordshire, England. Linear gate by EMI Electronics Limited, British. All other objects by C. H. & K. Limited, British, 1955-1975 Linear gate and integrator (counter) Nuclear Physics 1955-1975
Dental X-ray machine, used in chiropody, with fully articulated arm, by Watson, English, 1930-1950 Dental X-ray machine Chiropody 1930-1950
