Microscope
date: label: date made
content: ca 1915
name: label: maker
content: Bausch & Lomb
notes: label: Description
content: This Bausch & Lomb Petrographical Microscope Model LCH is a compound monocular with coarse and fine focus, handle arm, inclination joint, revolvable circular stage, polarizers and analyzers, adjustable mirror bar, and modified horseshoe base. The form is based on the design of Frederick Eugene Wright, a geologist with the Carnegie Institution of Washington. The inscriptions on the objective read “Bausch & Lomb Optical Co. / Rochester, N.Y.” and “SERIES 1 / ⅔ 0.25 N.A. / TUBE LENGTH 160.0 M.M.”
label: Description
content: Ref: Bausch & Lomb, <i>Microscopes and Accessories</i> (Rochester, N.Y., 1919), pp. 66-67.
label: Description
content: F. E. Wright, “A New Petrographic Microscope,” <i>American Journal of Science</i> 29 (1910): 407-414.
label: Description
content: Albert Johannsen, <i>Manual of Petrographic Methods</i> (New York, 1918), pp. 211-212.
label: Location
content: Currently not on view
place: label: place made
content: United States: New York, Rochester
topic: label: Subject
content: Science & Scientific Instruments
setName: label: See more items in
content: Medicine and Science: Medicine
label: See more items in
content: Microscopes
label: See more items in
content: Science & Mathematics
creditLine: label: Credit Line
content: Bausch & Lomb Optical Company
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MG.M-12210
label: accession number
content: 272522
label: catalog number
content: M-12210
objectType: label: Object Name
content: microscope
physicalDescription: label: Physical Description
content: metal (overall material)
label: Physical Description
content: glass (overall material)
label: Physical Description
content: brass (overall material)
label: Measurements
content: overall: 37.2 cm x 10.7 cm x 18.9 cm; 14 5/8 in x 4 3/16 in x 7 7/16 in