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BULLOCH CONGRESS MODEL

SERIAL NUMBER: 262

 Microscope
Microscope
Microscope


gvh The Bulloch Congress drawtube is controlled via rack and pinion, and although the original rack was missing, it has been replaced with a rack contemporary to the microscope. It is notable that, as the drawtube is raised, eventually a slot, which accomodates the rack when it is in the down position, opens to expose the inside of the tube. This is not a good design as dust and light could enter. As is shown to the left, this problem was solved on the Watson van Heurck models, which also had a rack and pinion control to the drawtube, by encasing the rack area in a rectangular compartment as in the Grand Van Heurck microscope in this collection.