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" ... but also an irregular, nonperiodic variation, sometimes running its course in a week or 10 days, at other times in longer periods, and ranging over irregular fluctuations of from 2 to 10 per cent of the total radiation in magnitude. "
Monthly Notices of the Royal Astronomical Society - Page 338
by Royal Astronomical Society - 1914
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Report of the Secretary and the Financial Report of the Executive Committee ...

Smithsonian Institution - 1910 - 592 pages
...that the sun is variable, having not only a periodicity connected with the periodicity of sun spots, but also an irregular, nonperiodic variation, sometimes...to 10 per cent of the total radiation in magnitude. I O £ ol i - /i -y I l es lSO .s> .92 .94 94' .93 .86 »J i 3a MONTHLY SOLAR-CONSTANT VALUtS, CALORIES....
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Annual Report of the Board of Regents of the Smithsonian ..., Volume 68, Issue 1

Smithsonian Institution. Board of Regents - 1914 - 1018 pages
...with the periodicity of sui spots, but also an irregular, nonperiodic variation, sometimes run ning its course in a week or 10 days, at other times in...over irregular fluctuations of from 2 to 10 per cent oi the total radiation in magnitude. 0. O 1) a m Z Z O 103 i.ao .si .92 .s» 3+ .as as 97 i-»e MONTHLY...
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The Principles of Aërography

Alexander McAdie - 1917 - 344 pages
...also an irregular, non-periodic 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 of the total. It has also been shown by Abbot, Fowle, Kimball, and others that great volcanic eruptions materially...
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Manual of Aerography for the United States Navy, 1918

1918 - 172 pages
...also an irregular, nonperiodic variation, 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. It has also been shown by Abbot, Fowle, Kimball, and others that great volcanic eruptions materially...
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