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Hugh Powell's 1841 MicroscopeHugh Powell produced this microscope in 1841 in response to a request from the Microscopical Society of London, who simultaneously asked for microscopes of similar design from the famous British inventors Andrew Ross and James Smith. During the next year (1842) Powell formed a partnership with Peter Lealand that became "one of the most famous associations in the history of the microscope". Powell was famous for his solidly built microscopes and this model is certainly no exception. The triangular stand (or foot) is very sturdy, and the body is designed around a single thick pillar combined with a compass joint for inclining the body, a common design motif employed by microscope makers of the period. Other innovative features of this microscope are the achromatic condenser and the binocular body (this was not part of the original microscope, but was retrofitted in 1862). The Achilles' heel of this microscope is the fine focus mechanism. Instead of moving the microscope body tube with a simple focus mechanism, Powell elected to move the stage with the assistance of inclined planes controlled by a thumbscrew, which did not provide a smooth and jerk-free motion. In addition, the stage moved separately from the condenser, necessitating a readjustment of the condenser after focusing the specimen. This basic microscope design was very successful and popular with scientists and was therefore utilized by Powell and Lealand for the next 50 years. BACK TO NINETEENTH CENTURY MICROSCOPES Questions or comments? Send us an email.© 1998-2022 by Michael W. Davidson and The Florida State University. All Rights Reserved. No images, graphics, scripts, or applets may be reproduced or used in any manner without permission from the copyright holders. Use of this website means you agree to all of the Legal Terms and Conditions set forth by the owners.
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