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Benjamin Martin Solar MicroscopeProlific British instrument designer Benjamin Martin made a wide variety of microscopes including the solar microscope illustrated below. This microscope is described and illustrated in a short treatise entitled Microscopes to the End of the Nineteenth Century by F. W. Palmer and A. B. Sahiar. The microscope is designed to fit into an opening in a window shutter and is used to project a large image on a screen, enabling several investigators to simultaneously examine specimens at high magnification. Sunlight is employed to illuminate the specimen and provide image-forming light rays. The base of the microscope contains a large mirror (to reflect sunlight into the microscope), which can be adjusted for tilt and rotation to optimize illumination. The body tube is constructed of cardboard covered with green shark-skin and contains a condenser lens at the base. A brass drawtube contains a Wilson-style microscope depicted here with a specimen slide fitted into the spring stage. A metal slider containing three objectives fits over the eyepiece to enable the microscopist to change magnification. Focus is achieved with a rack and pinion controlled by a knurled knob. BACK TO EIGHTEENTH 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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