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Small quartz spectrograph
Ion chamber
Torsion seismograph
Voltmeter, multicellular electrostatic
Wind direction plate with compass, Arabic
Diffraction grating, photo negative of
Spectrophotometer, quartz, Model DU
Zeichenapparat (drawing apparatus)
Ion chamber used by Millikan and Neher
Pentode, Western Electric 282A
Balance with two glass pans
Microscope, brass eyepiece
Voltmeter, multicellular electrostatic (A)
Sector, brass
pH meter, Model M
Planimeter no. 132
Ion chamber used by Millikan and Bowen
Radar switch tube
Microscope, monocular with wood box and keys
Galvanometer

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