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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.
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.
