Microscope

Description
This is a substantial compound monocular with coarse and fine focus, trunnion, mechanical stage, sub-stage mount, and accessories for petrographic work. The wooden case is lined with purple silk and velour. The “NACHET / 17 Rue St. Séverin / Paris” inscription refers to an important French optical firm that was begun by Camille Sebastien Nachet in 1839. The firm became Nachet et Fils around mid-century, moved to this address in the early 1860s, and began making petrographic microscopes around 1880.
This belonged to Kenneth E. Lohman (b. 1897), a geologist with the U.S. Geological Survey who was particularly interested in diatoms.
Ref: Albert Johannsen, Manual of Petrographic
Location
Currently not on view
Object Name
microscope
date made
after 1890
maker
Nachet et Fils
Physical Description
brass (overall material)
glass (overall material)
Measurements
case: 6 1/2 in x 19 1/2 in x 11 1/2 in; 16.51 cm x 49.53 cm x 29.21 cm
overall: 14 7/8 in x 4 1/4 in x 6 1/8 in; 37.7825 cm x 10.795 cm x 15.5575 cm
place made
France: Île-de-France, Paris
ID Number
MG*278133.01
catalog number
278133.01
M-12292
accession number
278133
subject
Science & Scientific Instruments
See more items in
Medicine and Science: Medicine
Microscopes
Science & Mathematics
Data Source
National Museum of American History, Kenneth E. Behring Center

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