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Scientific American, Vol. 84, No. 1 (1901) (1901)
leaf 8
um are rolled into sheets of from P. Langley has been accorded the tho to goo (Of a millimeter in thick- highest honors. ness, and from these sheets strips In 1867 Dr. Langley was called to = paw Peat le one millimeter wide and one centi- the charge of the Allegheny Obser- meter long, or less, are… … a degree can, I believe, be thus the extraordinary sun_ spots. noted ;” and it is evident from Four years later, in discussing © 1901 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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