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Edinburgh Student Microscope

W. Watson & Sons termed this microscope model H, when it was first introduced for medical students in May, 1934. The illustration below has been redrawn from photographs of the original microscope, which is featured in Gerard Turner's excellent book Collecting Microscopes, a volume in Christie's International Collectors Series of books on antiques.

The base is a sturdy tripod that supports the limb (and the rest of the microscope) through a locking swivel joint. The body tube contains a single interchangeable brass objective at one end, and a brass eyepiece at the other. Focus is achieved through a brass rack and pinion mechanism that moves with entire body with respect to the limb. The elaborate stage is equipped for mechanical translation of the specimen in both the X and Y directions, and the substage condenser is centerable and has a height adjustment. Beneath the condenser is a double mirror unit that is attached to the lower limb through a gimbal. This is one of the more intricate designs made for students, but demonstrates the degree of microscope sophistication in the mid-1930s.

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