Object Details
- Rowland, Henry A.
- Description
- “PHOTOGRAPHIC MAP OF THE SOLAR SPECTRUM / MADE BY PROF. H. A. ROWLAND, JOHNS HOPKINS UNIVERSITY.” This is from the first series, and extends from 37.1 to 39.85 units
- Henry A. Rowland, the first professor of physics at 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.
- Ref: “Photograph of the Normal Solar Spectrum. Made by Professor H. A. Rowland,” Johns Hopkins University Circular 5 (1886).
- Location
- Currently not on view
- Credit Line
- Columbia University
- 1886
- ID Number
- PH.322957.03
- accession number
- 249200
- catalog number
- 322957.03
- Object Name
- spectrum photograph
- Measurements
- overall: 11 3/16 in x 35 3/8 in; 28.41625 cm x 89.8525 cm
- place made
- United States: Maryland, Baltimore
- See more items in
- Medicine and Science: Physical Sciences
- Science & Mathematics
- National Museum of American History
- Record ID
- nmah_1826128
- GUID (Link to Original Record)
- https://n2t.net/ark:/65665/ng49ca746b3-1d8f-704b-e053-15f76fa0b4fa
