Open laser tube, for carbon dioxide laser, pin bar construction for use at atmospheric pressure 1970-1980
Replica of one of the apparatuses (1906) used by Rutherford to determine the ratio of e/m for alpha particles 1964-1974
Four gallon copper jug, stamped with official measure and maker's mark (unidentified) inside rim. Overall: 395 mm x 420 mm x 402 mm, 4.81kg. Four gallon copper ewer/measuring jug
Properties of Carbon Dioxide Instrument, original apparatus used by Thomas Andrews, 1863-1876. Apparatus made by J. A. Cumine, 57 Arthur Street, Belfast. Properties of Carbon Dioxide Gas Apparatus, 1863 1863
Copper ewer/measuring jug, with etched pattern around the waist. Overall: 340 mm x 315 mm x 280 mm, 2.81kg. Copper ewer/measuring jug
Animated lantern slide, Ross 'wheel of life'. Inscription: Copied from original designs by permission of the London Microscope Company PB. Wheel of Life magic lantern slide
Experimental photo-electric radiation pyrometer, temperature indicator. Designed by T. C. Keeley at the Clarendon Laboratory, Oxford, England, 1920-33. Photo-Electric Radiation Pyrometer (Temperature Indicator), 1920-33 1920-1933
Early Collins type expansion engine used in helium liquefiers, by The British Oxygen Company Limited, England, 1970-75. Collins' Expansion Engine from Helium Liquefier, 1970-75 1970-1975
Geiger-.Muller counter tube (type EHM2.) by General Electric Company Limited, England, 1939-1950 G.M. counter tube, type EHM2. G.E.C. 1939-1950
Helical pin gas discharge tube, component of carbon dioxide laser, made at the University of Hull, 1969. The tube would contain a gas mixture of 80% helium, 10% carbon dioxide and 10% nitrogen at atmospheric pressure. To initiate laser action, it is necessary to produce a homogeneous glow electrical discharge along the axis of the tube. This is attained by "summing" the individual spray discharges between opposite pins of the twin helix. The e.h.t. helix pins are ballasted by resistors. Helical pin gas discharge tube 1969-1971
Portable moving iron voltmeter, 12V+120V ranges, with one attached lead, in fitted case, 1925-49. Portable moving iron voltmeter 1925-1949
Brass box spanner, with a rectangular piece of brass and two glass plate components, from Prof. F.W. Aston's original Aston Mass-Spectrograph, by Francis William Aston, Cambridge, England, 1918-1925 Brass box spanner 1918-1925
Sectioned corrugated wave-guide for linear electron accelerator, unsigned, British, 1945-1955. With a display plaque. Sectioned corrugated wave-guide for linear electron accelerator 1945-1955
Copy of Rutherford's bombardment chamber used for his experiments on the collision of alpha particles with nitrogen nuclei, unsigned, British, 1964-1974 Copy of Rutherford's bombardment chamber 1964-1974
Sectioned Gun End and Target End wave-guide transformers for linear electron accelerators, unsigned, British, 1945-1955. With a display plaque for each transformer. Sectioned Gun End and Target End wave-guide transformers for linear electron accelerators 1945-1955