The Bausch Chest Type Field Microscope is a compact folding microscope patented by J.J. Bausch on June 9, 1874 — a design that bears the name of John Jacob Bausch, the German immigrant optician who co-founded Bausch & Lomb in Rochester, New York in 1853 and built it into one of the most important optical companies in American history. The “chest type” designation refers to the instrument’s ingenious folding design, which allowed it to collapse flat for storage and transport in a small case — making precision microscopy available in the field, at the bedside, or in locations far from a fully equipped laboratory.
This compact unit includes a dissecting type needle on a wooden handle for maneuvering specimens, reflecting its intended use as a field naturalist’s or physician’s portable examination tool. The combination of a brass optical head with a wooden stage and base was typical of American microscope construction in the 1870s, balancing optical precision with the practical warmth and workability of wood for the structural components. The mirror mounted below the stage — noted as non-functional in this example — would originally have been used to direct ambient light upward through the specimen for transmitted light microscopy.
The J.J. Bausch patent of 1874 places this instrument at the very beginning of Bausch & Lomb’s rise to optical prominence, making it a historically significant early example of American precision optical manufacturing. Collectors of both microscopy antiques and American industrial history will find this a compelling piece.
