| 1. |  | At the lensometer Dr. Edgar D. Tillyer at work, at the American Optical Southbridge | Tillyer, Edgar D. (Edgar Derry), 1881-1973; Optics -- Technological innovations; American Optical Company; Southbridge (Mass.)--Biography--Pictorial works. | Dr. Tillyer came to Southbridge, Massachusetts, in 1919, having worked at the U.S. Patent Office. The Optical Society of America has a medal named in honor of Dr. Tillyer. In Southbridge, Tillyer Ave.,... |
