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Electroscope, quartz fiber
Cloud chamber made by Willy Fowler--2 views
Henry Borsook
Charles C. Lauritsen with electroscope he developed for measuring X rays
Integrator
Planimeter
Planimeter
Brass plumb bob
Dietzgen odometer
Cylindrical calculator
Rolling parallel ruler
Dotting instrument
Keuffel and Esser drafting set
Proportional dividers
Proportional dividers
Proportional dividers
Tower drafting compass
Lietz drop compass
Elliot beam compass
Beam compass

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