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NIR-2 (Mk144) fuze
Slide rule
Ainsworth Transit
Oscillator, HF, Western Electric D156548
Lietz drop compass
Voltmeter, electrostatic, part of
Tubular bulb
Arithmometer, Model 11259
Plumb bob, Egyptian
Keuffel & Esser Alidade
Compass used in cosmic ray research
Ion chamber used by Millikan and Neher
Voltmeter, multicellular electrostatic
Weather guide (2 views)
Demonstration model, electron wave theory
AIR-8 (Mk149) fuze
AIR-3 fuze
Geiger counter used in muon experiment
Weights set