细节
A portable microscope by Bausch & Lomb,
in black enamel and lacquered brass, with coarse and fine focussing, two eyepieces, three objectives, sub-stage condenser and mirror, the stand with folding V-foot -- 10½in. (26.5cm.) high, in flat wood case with plaque of Division of Water Safety Control Navy pier Chicago
in black enamel and lacquered brass, with coarse and fine focussing, two eyepieces, three objectives, sub-stage condenser and mirror, the stand with folding V-foot -- 10½in. (26.5cm.) high, in flat wood case with plaque of Division of Water Safety Control Navy pier Chicago