Haemocytometer
date: label: date made
content: late 1920s
label: associated dates
content: 1929
notes: label: Description
content: One inscription on the lid of the case reads “AMERICAN STANDARD HAEMACYTOMETER / WITH / LEVY-HAUSSER COUNTING CHAMBER.” Another reads “ARTHUR H. THOMAS COMPANY / PHILADELPHIA / U.S.A.” The inscription inside the lid reads “FEICK BROS. CO. / SURGICAL INSTRUMENTS / PHYSICIANS SUPPLIES / PITTSBURGH, PA.” Inside the case are two Trenner diluting pipettes, a closure (clamp), instruction manual (copyright 1927), and counting chamber with an inscription reading “LEVY-HAUSSER / COUNTING CHAMBER / U.S. PATENT JAN 8, 1924.”
label: Description
content: Max Levy (1857-1926) was an American inventor and scientist recognized for having devised precision machinery for making the half-tone screens used in the production of relief printing plates by newspapers and magazines. He also invented a counting chamber for a haemocytometer for which he received the Edward Longstreth medal from the Franklin Institute.
label: Description
content: Ref: Max Levy, “Haemocytometer,” U.S. Patent 1,214,331 (Jan. 30, 1917).
label: Description
content: “MAX LEVY, SCIENTIST AND INVENTOR, DIES,” New York Times (Aug. 1, 1926), p. 30.
label: Description
content: Carl Adolph Hausser, “Haemacytometer,” U.S. Patent 1,480,391 (Jan. 8, 1924), assigned to C. A. Hausser & Son.
label: Description
content: Arthur H. Thomas Co. ad for Levy-Hauser Counting Chamber with Improved Neubauer Ruling, in The American Journal of the Medical Sciences n.s. CLXX (1925).
label: Location
content: Currently not on view
place: label: associated place
content: United States: Pennsylvania, Pittsburgh
label: associated place
content: United States: Pennsylvania, Pittsburgh
setName: label: See more items in
content: Medicine and Science: Medicine
creditLine: label: Credit Line
content: Gift of Robert A. Schein, M.D.
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1994.0032.01
label: catalog number
content: 1994.0032.01
label: accession number
content: 1994.0032
objectType: label: Object Name
content: diagnostic
label: Object Name
content: hemacytometer
label: Object Name
content: haemacytometer
physicalDescription: label: Physical Description
content: leather (overall material)
label: Physical Description
content: textile, velvet (overall material)
label: Physical Description
content: rubber (overall material)
label: Physical Description
content: glass (overall material)
label: Physical Description
content: green (overall color)
label: Physical Description
content: gold (overall color)
label: Measurements
content: average spatial: 2.4 cm x 20.1 cm x 11.6 cm; 15/16 in x 7 29/32 in x 4 9/16 in
label: Measurements
content: overall: 7/8 in x 7 7/8 in x 4 5/8 in; 2.2225 cm x 20.0025 cm x 11.7475 cm