Leitz #222813


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The test image was taken with an overall magnification of 100
(objective 10x, eye-piece 10x) and a simple torch illumination.


Description of the Leitz microscope

This type of microscope on the basis of the so-called "international" design was sold with minor variations by the most reknowned U.S. and European manufacturers in the 1920s. The Leitz company instrument shown here has the serial number 222813. It comes with a monocular draw-tube, a rotatable nosepiece with three standardized thread objectives (10x "3", 45x "6" and "1/12" oil immersion), a round, rotatable object table with rubber coating and a complicated "Abbe"-type condenser with two iris apertures one of which can be de-centered for use of raking light. Only separate knobs for coarse and fine focussing were available at this time. It has a double, concave and plane mirror and was built around 1925. The price is depending on the mood of the salesmen and the mood of the customer, in the range between 200 and 300 US $.


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Brass objectives with standardized RMS (Royal Microscopical Society) threads.


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Komplex condenser.


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Adjustable strength of inclination fixing. On top, right, the specimen holders.


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An unusual perspective: The specimen as seen from below through the object table.



Overall, even today a fully usable instrument.



If you should be interested in historical microscopes you might visit those two fine websites:

The microscope museum by Dr. Hauke Kahl
and the  Microscope collection by Timo Mappes.

© Text, images, and video clips by  Martin Mach  (webmaster@baertierchen.de).
Water Bear web base is a licensed and revised version of the German language monthly magazine  Bärtierchen-Journal . Style and grammar amendments by native speakers are warmly welcomed.


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