Dr. L. R. Koller, of Schenectady, has developed a new daylight recorder. It is so sensitive that it can record the light intensities in the entire range between starlight and direct sunlight.
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Dominion, Volume 22, Issue 75, 21 December 1928, Page 10
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32Untitled Dominion, Volume 22, Issue 75, 21 December 1928, Page 10
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