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COMPOUND MONOCULAR MICROSCOPE

RETAILER: DOLLLOND

MAKER (ATTRIB):HUGH POWELL

c. 1840

SIGNED: 'DOLLOND, LONDON'

COLLECTION OF: Dr Jurriaan de Groot

Dollond(Powell) microscope

The coarse focus is operated by two knurled heads working through a pinion carried within a slider attached to the body tube, the mechanism being internally sprung by a roller bearing from the other side to eliminate any forward and backward slack and also sprung by a piece of bent brass from the right side internally to prevent right-left slack. The rack is embedded into the upper part of the front of the limb.