Spectrograph
date: label: date made
content: around 1950
notes: label: Description
content: This spectrograph came from the Naval Research Lab, an organization that, since its establishment in 1923, had applied science to military and naval purposes. It dates from around 1950. According to its manufacturer, it was “in permanent adjustment” and “always ready for use.” It has a slit with stainless steel jaws and screw adjustment, a plate holder, and a constant-deviation quartz prism of the Cornu form. The base is of heavy iron, with a hollow in the bottom into which would fit a horizontal bar that could hold various accessories. Hence, presumably, the term BARFIT.
label: Description
content: One tag on the instrument reads “HILGER.” Another reads “ADAM HILGER LTD. LONDON / THE WORDS BARFIT / ARE REGD IN / GREAT BRITAIN 568.606 / U.S.A. 345.762.” An inscription near the slit reads “HILGER / F.758.301 / 49634.” An inscription on the prism housing reads “N° E.484.303/47304.” A tag marked “JARRELL-ASH COMPANY / SCIENTIFIC INSTRUMENTS / BOSTON. MASS.” identifies the firm that imported this spectrograph into the United States. A torn paper tag reads “PROPERTY OF . . .”
label: Description
content: Ref: Adam Hilger, Ltd., <i>Hilger Barfit Small Quartz Spectrograph (FD 20 cm.) with Bar for Accessories</i> (June 1938).
label: Description
content: Adam Hilger, Ltd., <i>Catalogue E</i> (London, 1948), pp. 14-15.
label: Location
content: Currently not on view
place: label: place made
content: United Kingdom: England, London
topic: label: Subject
content: Science & Scientific Instruments
setName: label: See more items in
content: Medicine and Science: Physical Sciences
creditLine: label: Credit Line
content: Naval Research Laboratory
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1995.0048.01
label: catalog number
content: 1995.0048.01
label: accession number
content: 1995.0048
objectType: label: Object Name
content: spectrograph
physicalDescription: label: Measurements
content: overall: 17 1/2 in x 23 in x 16 in; 44.45 cm x 58.42 cm x 40.64 cm
label: Measurements
content: overall: 17 1/8 in x 22 3/4 in x 16 in; 43.4975 cm x 57.785 cm x 40.64 cm