Spectrometer
date: label: date made
content: 1872-1900
name: label: maker
content: Browning, John
notes: label: Description
content: This spectrometer produced a high dispersion by passing light through the lower part of four tall equilateral prisms, through a totally reflecting prism, and back through the upper part of the prisms. It was probably made to order (for whom we do not know), and was probably fairly expensive. The “John Browning 63 Strand, London” inscription on the horizontal circle refers to the first important English spectroscope maker. Browning was at this address from 1872 to around 1900.
label: Description
content: Browning advertised this as a “Large Model Spectroscope, for the use of Physicists,” noting that it cost over ₤38, and was similar to the one he had made for John Peter Gassiot, a prominent fellow of the Royal Society of London.
label: Description
content: Ref: John Browning, <i>How to Work with the Spectroscope</i> (London, 1878), p. 57.
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
label: See more items in
content: Science & Mathematics
label: See more items in
content: Optics
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.318374
label: catalog number
content: 318374
label: accession number
content: 234201
objectType: label: Object Name
content: spectrometer
physicalDescription: label: Measurements
content: overall: 14 in; 35.56 cm
label: Measurements
content: aperture, telescope: 1 1/2 in; 3.81 cm
label: Measurements
content: aperture, collimators: 1 1/2 in; 3.81 cm
label: Measurements
content: focal length: 18 in; 45.72 cm