Microscope
date: label: date made
content: early 20th century
notes: label: Description
content: Compound monocular microscope designed for use with the Brinell Ball Test for determining the hardness of a piece of metal. Here, a small ball is pressed into a sample, and the resulting indentation is examined with a Brinell microscope. Johan August Brinell, a Swedish engineer, proposed the test in 1900. The results are given in BHN (Brinell hardness numbers).
label: Description
content: Ref: Bausch & Lomb, <i>Microscopes, Microtomes and Accessories</i> (Rochester, 1922), p. 100.
label: Location
content: Currently not on view
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: New Eyes for the Needy, Inc.
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MG.220982.01
label: catalog number
content: 220982.01
label: accession number
content: 220982
label: catalog number
content: M-09796
objectType: label: Object Name
content: microscope accessory
physicalDescription: label: Measurements
content: case: 2 1/8 in x 8 3/4 in x 2 1/2 in; 5.3975 cm x 22.225 cm x 6.35 cm
label: Measurements
content: microscope: 7 in x 1 3/4 in; 17.78 cm x 4.445 cm