Densitometer
date: label: date made
content: 1969
name: label: maker
content: Millipore Filter Corporation
notes: label: Description
content: A densitometer measures the optical density of an image. The inscriptions on the label of this example read “Millipore / PhoroScope” and “Millipore Corp., Medford, Massachusetts.” PhoroScope was the trademark of the Millipore Corp., registered in 1969.
label: Description
content: During the Allied bombing of World War II, German scientists developed membrane filters for military and domestic water supplies. During the Korean War, scientists at the California Institute of Technology and at the U.S. Army Chemical Corps improved the method; and the Lovell Chemical Co. received a government contract for further development. In 1953, when these membranes were declassified and offered for commercial use, John H. (Jack) Bush, a Lovell employee and a son of Vanevar Bush, bought the rights to the technology for $200,000 and established the Millipore Filter Company. He also coined the word millipore to refer to many small openings in the microporous membrane. As the product range expanded, the firm became the Millipore Corporation. In 2010, Merck KGaA acquired Millipore Corporation, and formed EMD Millipore.
label: Description
content: Ref: “Space Age Progress is Filtered Through Millipore,” Boston Globe (Sept. 20, 1959), p. A10.
label: Location
content: Currently not on view
place: label: place made
content: United States: Massachusetts, Bedford
setName: label: See more items in
content: Medicine and Science: Chemistry
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2005.3062.01
label: nonaccession number
content: 2005.3062
label: catalog number
content: 2005.3062.01
objectType: label: Object Name
content: phoroscope electrophoresis densitometer
physicalDescription: label: Physical Description
content: metal (overall material)
label: Measurements
content: overall: 14 in x 17 in x 17 1/2 in; 35.56 cm x 43.18 cm x 44.45 cm
label: Measurements
content: overall: 13 1/2 in x 7 1/2 in x 16 in; 34.29 cm x 19.05 cm x 40.64 cm