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Kratometer
TRIAL CASES, FRAMES AND REFRACTOR HEADS
refractor head; refacting unit
General Optical Co Inc
North America: USA, New York, Mount Vernon
c.1926-1929
metal; glass
1999.336
TRIAL CASES, FRAMES AND REFRACTOR HEADS
refractor head; refacting unit
General Optical Co Inc
North America: USA, New York, Mount Vernon
c.1926-1929
metal; glass
Kratometer/Phoropter. Black metal. Tripod base. Chin rest. Two round lens batteries (oen each for left and right eye) with sight apertures, supplemental prisms, Maddox Rods and red filters; also double drop cells in front and a single drop cell behind. Two suspended slide racks of 13 round prismatic lenses with clear apertures at either end. White metal. Scale marked 1-13 on edge. Stand at opposite end of tripod base is unoccupied.
1999.336