The scientific papers of Sir William Huggins (1909)
Huggins, William, Sir, 1824-1910, Huggins, Lady, d. 1915 · London, W. Wesley and son · leaf 405
ption, which are broadand strong in comparison with the solar lines, were determined by the micro-meter and by direct comparison with the spectra of terrestrial substances. The spectroscope was furnished with one prism of dense flint-glass, havinga refracting-angle of 6o°, an observing telescope… … Fig- 47- strong lines, which are drawn in the diagram. The least refrangible of theselines occurs in a faint part of the spectrum, and could not be measured. Itsposition was estimated only, and on this account it is represented in thediagram by a dotted line. The positions of the other lines were…
Astronomy
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