Ernst Leitz, Wetzlar, No. 196553

Leitz Large Travelling Microscope "DT", c. 1920

Ernst Leitz, Wetzlar; serial # 196553. Leitz Large Travelling Microscope "DT", c. 1920. Stored in the case.

Ernst Leitz, Wetzlar; serial # 196553. Leitz Large Travelling Microscope "DT", c. 1920

Ernst Leitz, Wetzlar; serial # 196553. Leitz Large Travelling Microscope "DT", c. 1920

Ernst Leitz, Wetzlar; serial # 196553. Leitz Large Travelling Microscope "DT", c. 1920

Ernst Leitz, Wetzlar; serial # 196553. Leitz Large Travelling Microscope "DT", c. 1920

Ernst Leitz, Wetzlar, No.196553. Large Travelling Microscope "DT", c. 1920. fine adjustment

Ernst Leitz, Wetzlar; serial # 196553. Leitz Large Travelling Microscope "DT", c. 1920. Signature

Ernst Leitz, Wetzlar, No.196553. Large Travelling Microscope "DT", c. 1920. substage Ernst Leitz, Wetzlar, No.196553. Large Travelling Microscope "DT", c. 1920. Condenser removed.

Ernst Leitz, Wetzlar, No.196553. Large Travelling Microscope "DT", c. 1920. leather covered case.

From: the 1929 Leitz catalog:

Leitz Large Travelling Microscope "DT"

Leitz Large Travelling Microscope "DT" stored in the case

Leitz Large Travelling Microscope "DT" catalog description

LARGE TRAVELLING MICROSCOPE "DT"

Body Tube-Is of 35mm diameter. It is provided with draw tube for stanard oculars, the draw tube being graduated in single millimeters, every tenth line numbered.

Focusing Adjustment-Coarse adjustment is by rack and pinion. The fine adjustment consists of a sensitive and precise but extremely rugged micrometer screw to withstand rough handling to which microscopes used in travelling are naturally subjected. One micrometer head is equipped with divided drum with vernier which records the lateral displacement of the microscope tube within 0.004 mm and consequently permits accurate measurements of the thickness of specimens.

Stage-Of metal, completely covered with vulcanite; measures 90x90 mm; provided with stage clips. It is mounts to a strong inclinable bracket to permit its folding parallel to the pillar.

Substage-Simplified model with two-lens condenser N.A. 1.20 in swing-out mounting, having iris diaphragms above and below the condenser, provided with quick acting screw for raising and lowering the condenser; the substage is swung out of optical axis when the screw, reaches the limit of its downward motion; mirror with plano and concave surfaces has universal adjustment and is mounted to a swinging arm for oblique illumination.

Base, Pillar and Arm-The base is of foldable pattern. The pillar has a double joint and friction device to hold the stand at any desired angle while stops are provided for horizontal and vertical positions. The arm is of heavy curved form furnishing ample space for large specimens.

Finish-In alcohol-proof lacquer throughout.

Case-Covered with strong leather, velvet lined, corners protected by metal trimmings.


 

This microscope was purchased from the family of the original owner, Dr. Cedric E. Filkins, MD (1888-1975). Dr. Filkins graduated from Syracuse University School of Medicine in 1914 and completed post graduate training at the Columbia University School of Medicine in New York during the 1914-1916 period. He served with the U.S. Army Medical Corps in Germany during WWI with the rank of Captain. By 1920, he established a private general practice in the suburban Philadelphia area and was a staff physician at Jefferson and Cooper Hospitals. He was involved with volunteer  activities during WWII. He retired from active practice around 1970.

Dr. Cedric E. Filkins

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