Rowland Solar Spectrum

Henry A. Rowland, the first professor of physics at The Johns Hopkins University in Baltimore, Md., produced a photographic map of the solar spectrum using concave diffraction gratings made with his own ruling engine. The first edition, published in 1886, covered the region from wave-length 3100 to 5790. The scale of these maps was much greater than the maps of Angstrom or Rutherfurd, and they showed many more spectral lines. This set has five of the original seven plates.
Currently not on view
Object Name
spectrum photographs
date made
Rowland, Henry A.
place made
United States: Maryland, Baltimore
ID Number
catalog number
accession number
Science & Mathematics
See more items in
Medicine and Science: Physical Sciences
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Columbia University

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