This folder contains documents relating to experiments with x-rays and other physical phenomena. Among the documents for 1916 is correspondence with Edison investor James Gaunt and his brother, physician Thomas T. Gaunt, on chemical and electrothermal cancer treatments; a communication from Edison's chief engineer Miller Reese Hutchison concerning scientist-inventor Peter Cooper Hewitt's work on ultraviolet light; and a letter from Rockefeller Institute librarian Lillia M. D. Trask about a list of fluorescent salts prepared by Edison in 1896.

Approximately 40 percent of the documents have been selected. The unselected items are general inquiries that were not answered or were referred elsewhere.

Courtesy of Thomas Edison National Historical Park.