Seller: Main Street Fine Books & Mss, ABAA, Galena, IL, U.S.A.
Signed
This all-around science guy edited "Scientific American" and "Popular Science Monthly" until named first director of Chicago's new Museum of Science and Industry in 1928; that fizzled after a few years and he became "The New York Times" editor of science and engineering for the remainder of his life; in his spare time he penned a handful of books about a wide range of science topics. TNS, 1p, 8½" X 11", New York, NY, 11 September 1941. Addressed to Arnold F. Gates (1914-93, noted Lincoln/Civil War scholar). Very good. Light original folds. On "The New York Times" letterhead, Kaempffert thanks an admirer for kind words about his most well-known book: "I am glad that you like the 'Popular History of American Invention.' I am now at work on a volume which is to deal with science and democracy." Boldly signed in black ink.