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A COMPARISON OF THE ORIGINAL FORM OF 'NEW MICROSCOPE' OF POWELL & LEALAND WITH THEIR LATER 'No 3' MODEL

MAKER: POWELL & LEALAND

pl3 By 1865, as shown in the example in the Billings collection, the microscope had no struts from the arm to the optical tube, and for the first time, a much thinner stage. The understage accessories, instead of using a bayonet fitting, now attached to the bottom of the stage by sliding in on a plate.