COMPOUND MONOCULAR MICROSCOPE
MAKER:ANDREW PRITCHARD
MODEL:'ACHROMATIC ENGISCOPE'
c. 1854
SIGNED: 'Andrew Pritchard, 162 Fleet street. London'
SERIAL NUMBER: 560
THIS PAGE: The substage paraboloid
There is a large parabolic illuminator for dark ground illumination protected by brass caps at both ends, which slides into a brass sleeve (right side of the picture) which screws into the lower tubular fittings of either the Bonanni or the plain stage.