C. Kellner's nachfolger, FR. Belthle in Wetzlar, No. 945, c. 1866

(Objectives signed Belthle & Leitz)

Small model microscope (Kleines Mikroskop)

C. Kellner's nachfolger, FR. Belthle in Wetzlar, No. 945, c. 1865 C. Kellner's nachfolger, FR. Belthle in Wetzlar, No. 945, c. 1865 C. Kellner's nachfolger, FR. Belthle in Wetzlar, No. 945, c. 1865

  C. Kellner's nachfolger, FR. Belthle in Wetzlar, No. 945, c. 1865

The microscope was found with three eyepieces numbered I, III, and V and four objectives; the number 1 is signed " B.L.", the numbers 3 and 7 are signed "Belthle & Leitz", and the number 4 is unsigned. In the 1866 price list, this model is referred to as the "Kleines Mikroskop". It is 12.25 inches tall as shown in the figure. The round iron base is painted black and is 3 and 3/8 inches in diameter. A short iron pillar rises from the base and engages a short oxidized brass arm that supports the main body of the microscope. This arm can freely rotate about the base so that the microscope is capable of full 360° rotation. The single sided concave mirror is attached to a arm with a swivel joint that allows lateral side to side movement of the mirror. The coarse adjustment is by push tube. The outer tube is sprung and contains an adjustment screw that allows the tension to be altered. The fine adjustment utilizes a micrometer screw located under the pillar. The round stage has an oxidized brass finish. There is no provision for stage clips. Inset under the stage is a wheel with five apertures.

Magnification chart

Magnification chart

Magnification chart

Kleines Mikroskop von Belthle

This is an example of the small sized model produced by the firm corresponding to the model 3. See: Fr. Belthle, Nachfolger von C. Kellner, in Wetzlar- Price list for 1866.

Represented in this collection is another example of this model having a different selection of optics and a different layout within the wood storage case.

Unfortunately, the production archives retained by Leica Microsystems GmbH of microscopes made in the early period of the Optical Institute in Wetzlar do not have an entry for this microscope and therefore the original purchaser will remain unknown. It was purchased for this collection in the USA.


For more information about this microscope and related instruments see the article:

Some Early Microscopes from the Optical Institute in Wetzlar

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