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Radiation Monitor

nu_101, Model 1613

Almy's X-Ray Tube

This probably is the x-ray tube Professor Almy used to produce his first x-ray photographs in February 1896.

Almy's X-Ray Photograph of Keys and Coins

A photographs taken by Professor Almy in February 1896. The colors are the result of fading. Originally all would have been black and white.

Almy's X-Ray Photograph of Frog

A photograph taken by Professor Almy in February 1896. The colors are the result of fading. Originally all would have been black and white.

Almy's X-Ray Photograph of Hand

A photograph taken by Professor Almy in February 1896. The colors are the result of fading. Originally all would have been black and white.

Electric Egg

The electric egg is a glass vessel with an electrode at the top and another electrode at the bottom. At the bottom also is a tube with stopcock through which the air in the vessel can be pumped. It is used to demonstrate the production of light by a static electric charge. If the egg is evacuated and then a large static charge is place on the upper electrode, perhaps by connecting it to a static machine, a glow fills the egg. This was once suggested as a way to produce safe illumination in mines, but it was found that the glow does not persist long enough to be useful. This instrument was sold by Queen & Co. but probably was manufactured in Europe. The date is unknown.

Homemade Geiger counter

Grinnell's first Geiger counter which unfortunately is broken.

Discharge Tube and Wooden Base

Similar to a Crooke's discharge tube.

Glass sphere on Wood Base

This may be a discharge tube.

Hot Cathode X-ray Tube with Metal Collimator

According to Grant Gale, this belonged to Dr. Lemley, the first dentist in Grinnell to have x-rays.

Nuclear Survey Meter

Ionization Chamber Model 2586