Bausch & Lomb microscope with 10x power magnification. The three objectives are marked 4 mm, 16 mm, and 1.9 mm. The microscope has brass objectives, eyepice and fin and coarse adjustment knobs. It was patented on January 5, 1915. This particular microscope was used in the WKU Biology Department lab in the original Snell Hall. It measures 11 1/2 inches high, 4 inches wide and and is 6 1/2 inches long.