Joseph Zentmayer Antique Microscope
Joseph Zentmayer Antique Microscope, shows age, 1800's
Joseph Zentmayer (March 27, 1826 — March 28, 1888) was a German-American maker of microscopes and other optical instruments. For sheer magnificence and quality of workmanship, few microscopes made in the United States can rival the instruments made by Joseph Zentmayer of Philadelphia in the last half of the 19th century. Zentmayer's crowning achievement was the glorious Centennial Model, made in April 1876, so named because it was exhibited at the Centennial in Fairmount Park. The Centennial Commission awarded Zentmayer a medal for the high quality of his workmanship and for the several innovations incorporated in his new microscope. These innovations, later copied by most of the better microscope makers in this country and abroad, included a smooth-working glass microslide holder and object stage, and a swinging substage mechanism for oblique illumination.