Spectroscope
date: label: date made
content: 1865-1890
name: label: maker
content: Browning, John
notes: label: Description
content: John Browning (ca. 1831-1925), the first important English spectroscope maker, introduced this type of Model Spectroscope in 1865 and was still offering it at the end of the century. It has two dense glass prisms, a collimator, and a viewing telescope with two eyepieces. A small reflecting prism next to the slit allows two spectra to be seen at the same time. One quarter of the horizontal circle is graduated to 20’ and read by Vernier and magnifier. The inscription on the circle reads “John Browning, London.” The instrument fits into a polished mahogany case.
label: Description
content: John Putnam Marble (1897-1955) was an analytical chemist who worked on the determination of geologic time under the auspices of the National Research Council, served as a volunteer Associate in Mineralogy with the Smithsonian Institution, and was remembered as “an amateur, one who cultivates his science from taste, without pursuing it for gain.” Marble owned this instrument, but was probably not the first to do so.
label: Description
content: Ref: John Browning, <i>How to Work with the Spectroscope</i> (London, 1874), p. 5.
label: Description
content: W. F. Foshag, “Memorial of John Putnam Marble” published by the Mineralogical Society of America.
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
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content: Science & Mathematics
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content: Optics
creditLine: label: Credit Line
content: Estate of John Putnam Marble
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.316651
label: catalog number
content: 316651
label: accession number
content: 206607
objectType: label: Object Name
content: spectroscope
physicalDescription: label: Measurements
content: telescope: 9 3/4 in x 14 in; 24.765 cm x 35.56 cm