 Observatory, shows that we must attribute the changes to the sun itself and not to the interposition of matter between the earth and the sun. Thus we may conclude that the sun is variable, having not only a periodicity connected with the periodicity of...  Monthly Notices of the Royal Astronomical Society - Page 338by Royal Astronomical Society - 1914Full view - About this book
 | Smithsonian Institution - 1910 - 592 pages
...0 +f 4 0 -r .!-.' Y n *?PT T* ~re 0? X" + + / + 0 / + / o co l • a ieo z " B a 2.00 n + physical Observatory, shows that we must attribute the changes...only a periodicity connected with the periodicity of sun spots, but also an irregular, nonperiodic variation, sometimes running its course in a week or... | |
 | Smithsonian Institution. Board of Regents - 1914 - 1018 pages
...we must attribute the changes t< the sun itself and not to the interposition of matter between th< earth and the sun. Thus we may conclude that the sun...only a periodicity connected with the periodicity of sui spots, but also an irregular, nonperiodic variation, sometimes run ning its course in a week or... | |
 | Alexander McAdie - 1917 - 344 pages
...but as due to causes outside of the earth ; and thus we may conclude that the sun is a variable star, having not only a periodicity connected with the periodicity...variation, sometimes running its course in a week or ten days, again in longer periods, and ranging over irregular fluctuations of from 2 to 10 per cent... | |
 | Alexander McAdie - 1917 - 344 pages
...and thus we may conclude that the sun is a variable star, having not only a periodicity variable star connected with the periodicity of sunspots, but also...variation, sometimes running its course in a week or ten days, again in longer periods, and ranging over irregular fluctuations of from 2 to 10 per cent... | |
 | 1918 - 172 pages
...but as due to causes outside of the earth; and thus we may conclude that the sun is a variable star, having not only a periodicity connected with the periodicity...sometimes running its course in a week or 10 days, again in longer periods, and ranging over irregular fluctuations of from 2 to 10 per cent of the total.... | |
 | Smithsonian Institution. Board of Regents - 1914 - 1030 pages
...earth and the sun; but other evidence, which is more fuily explained in Volume III of the Annals of the Astrophysical Observatory, shows that we must attribute...only a periodicity connected with the periodicity of sun spots, but also an irregular, nonperiodic variation, sometimes running its course in a week or... | |
 | Smithsonian Institution. Board of Regents - 1914 - 1008 pages
...^ + ^X ~ +f Wf T" T. y* T or */: -r + / T e / o + la 1 * • 0 iVo 1 v < > i.oo a *• ti physical Observatory, shows that we must attribute the changes...only a periodicity connected with the periodicity of sun spots, but also an irregular, nonperiodic variation, sometimes running its course in a week or... | |
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