Physicist known for his work on measuring the speed of light (1852-1931) who, in 1907, became the first American scientist to win a Nobel Prize. TLS signed “A. A. Michelson,” one page, 8.5 x 5.5, University of Chicago letterhead, December 10, 1926. letter to Sr. Walter S. Adams at the Mount Wilson Observatory, in part: "I am glad to hear of the progress with the steel interferometer frame, and also of the surprising visibility of San Jacinto." In fine condition, with several vertical folds.
