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541 items

http://omekax.grinnell.edu/PhysicsInstrumentMuseum/files/original/780da879205d4792410b5a4117dd80a8.JPG image/jpeg thumbnail

Pair of Switches

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Black Rotary Dial Desk Phone

http://omekax.grinnell.edu/PhysicsInstrumentMuseum/files/original/4035ecbf9ef24032087ea7e03cf35d63.JPG image/jpeg thumbnail

Rotary Dial Wall Phone

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Phone Receiver

http://omekax.grinnell.edu/PhysicsInstrumentMuseum/files/original/ec1f3a7c977a47b6bc750d23798d4680.JPG image/jpeg thumbnail

Candlestick Phone ca 1900

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Candlestick Phone Modified for Dial ca 1900

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Microscope

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Spencer Microscope 115833

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Solar Microscope

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Microscope Polarizers

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Drawing Instruments in Leather Case

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6 inch Silicon Wafer with 386 Chips

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Grinnell College's First Adding Machine

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Early 1900s Monroe Adding Machine

http://omekax.grinnell.edu/PhysicsInstrumentMuseum/files/original/cf33b63aaf5ae5b2eaefb457dbcdaf10.JPG image/jpeg thumbnail

Sharp Calculator

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Marchant Calculator

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Clary Calculator

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Electric Calculator

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Foot X-ray Machine

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Telegraph Key

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Lantern Glass

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Radio Transmitter

Model HT-40
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Anoxia Photometer

Model 17-006
http://omekax.grinnell.edu/PhysicsInstrumentMuseum/files/original/d451a19122a2ecf998e361753211c9a3.JPG image/jpeg thumbnail

Lightning Rod