#ERNST LEITZ WETZLAR GERMANY 548994 MICROSCOPE MOVIE#

#ERNST LEITZ WETZLAR GERMANY 548994 MICROSCOPE MOVIE#

By the end of the first decade of the 20 th century, Leitz had expanded its product line to include film projectors for the nascent movie industry and binoculars. In the first 20 years the company produced 15,000 microscopes. While telescopes were the original focus of the business, microscopes soon became the primary product.Д®rnst Leitz was hired as an engineer 1865 and was running the company by 1869 when he reorganized it as the Optical Institute of Ernst Leitz. *Thanks to Dr Tilman Halder for providing an exact date, as microscope number 337917, the very next number and precisely the same model, has a magnification card with the production date in the fall of 1938.The Leitz microscope traces its lineage to a company founded in 1849 in Wetzlar, Germany, the Optical Institute. John Field for his expertise in the history of Leitz microscopes and some of the illustrations provided herein. As equipped, it sold in 1949 for what would be over $15,000 in 2013 dollars. The CM was stillД«eing advertised in 1949. Supports from the foot, whereas the CMU model from about 1952 has squared off shaped supports. The CMU model which differs from this model only in that the model shown here has a rounded shape of the upright I am grateful to Dr John Field, an expert on Leitz microscopes, for this information on the evolution of the Leitz pol scopes. The CM model shown on this web page features an 'aa' model substage, and there were three others in succession, the a, b, and c. Then the BM was offered and included the mechanical stage as a standard fitting, whereas it was an extra accessory for this CM model. The next design was the AM which gave the stage rack and pinion focusing. This model, the CM, added rack and pinion focusing to the Bertrand lens, retaining the large diamter tube.

The GM added a slide-focusing Bertrand lens. The KM model had a larger diameter 30 mm tube. Later on, these designs became less promoted, and others were offered. During the early period, the MI and MII were the more sophisticated models. The IIIM was the student pol microscope for many years. This is one of a long line of Leitz polarizing microscopes. In arranging for hundreds of Jewish families to escape the holocaust. During WWII Ernst Leitz II and his daughter were instrumental Inherited the firm from his father and ran it during the 1930's and 1940's. The condenser on this microscope is known as the model 'aa' Berek condenser, and was the most complex of the models offered. The famous Dr Berek (who refused to work for the Nazis), who was responsible for many important concepts in optics and polarizing microscopy, worked for the LeitzД¬ompany until his death in 1949. There was even a specialized catalog for polarizing microscopes starting in 1893.

By 1890 there was a catalog listing forДЄ petrographic stand. Leitz started producing polarizing microscopes after 1885. HISTORY OF THE LEITZ POLARIZING MICROSCOPES.

The model 'aa' polarizing condensor assembly.

A black plastic adapter for the oculars.

Ocular, Signed: 'Periplan GF 16X, Ernst Leitz GmbH Wetzlar'.

Ocular, Signed: 'Ernst Leitz, Wetzlar, 6X, M.' with three scales, one vertical logarithmic scale calibrated 0-20, and two separate horizontal scales, one on each side of the vertical scale calibrated linearly from 0-30, right to left for the scale on the left side and 0-30, left to right on the right side.

An objective signed: 'VICKERS, N2053' and on the other side: 10/0.25.

An objective signed: 'COOKE' and on the other side: '20X 0.5' and also: 'C3876 MET.'.

A later objective signed: '170/0.17, 40/0.65,' and on the other side ' Leitz, WETZLAR, GERMANY.

LEITZ,WETZLAR in insignia) and also 'A.U., N o9' and '5, 30X'

A half lacquered-brass objective signed: '(E.

Pol objective: 'p3, A=0.25, 10:1' and on the other side (Leitz, Wetzlar in insignia).

Pol objective signed: 'p6L, (Leitz, Wetzlar in insignia), Germany,and on the other side: 'A=0.65, 45:1'.

Two wave plates, one labelled 'Glimmer Вј О» and the other 'Gips rot I'.

Two wrenches to adjust the nosepiece centering fittings.

Eight individual centerable nosepiece fittings.A removable finger-jointed box within the case with holds all the accessories except the oculars.

Ernst leitz wetzlar germany 548994 microscope