Abstract
In 1879, I gave an account of a series of broad lines in the photographic region of the spectrum which was found to be characteristic of Sirius, Vega., and other white stars, and which was identified as a continuation of the spectrum of hydrogen beyond H. In the photographs of Sirius which I had taken up to that time, I was not able to be certain if the two most refrangible of the lines,
θ
and
l
, were present. This uncertainty has been set at rest by photographs taken since, in which the complete series of the hydrogen lines, including
θ
and
l
, come out with great distinctness.
Subject
General Earth and Planetary Sciences,General Environmental Science
Cited by
18 articles.
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