Spectrophotometer
name: label: maker
content: Franz Schmidt & Haensch
notes: label: Description
content: This instrument was collected from Willson Products, a firm in Reading, Pa., that made such things as glasses and goggles. It consists of a large rectangular black box, with an air-cooled incandescent light source at one end that is surrounded by a parabolic reflector. The rest of the box is empty. At the opposite end is a place for the light to exit, after passing through a series of glass diffusers. The light could then be analyzed by a Franz Schmidt & Hanesch photometer (#461) mounted on a tripod external to the box. The photometer has two apertures for the comparison of beams. Accession paperwork states that this is a Koenig-Martens type spectrophotometer, but there is no evidence of a dispersion prism, and all the incandescent bulbs provided with the instrument imply analysis with only white light. Aside from the photometer, there are no maker’s marks on the box containing the light source.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Chemistry
creditLine: label: Credit Line
content: Gift of Willson Products
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: CH.337184
label: catalog number
content: 337184
label: accession number
content: 1979.0570
objectType: label: Object Name
content: Photometer
physicalDescription: label: Measurements
content: overall: 47.5 cm x 40.7 cm x 1.89 cm; 18 11/16 in x 16 1/32 in x 3/4 in
label: Measurements
content: overall: black metal box: 18 in x 74 1/2 in x 16 1/4 in; 45.72 cm x 189.23 cm x 41.275 cm
label: Measurements
content: overall spectrophotometer: 16 1/2 in x 7 1/2 in x 7 1/2 in; 41.91 cm x 19.05 cm x 19.05 cm
label: Measurements
content: overall: cr7163: 60 in x 92 in x 29 in; 152.4 cm x 233.68 cm x 73.66 cm