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Triumphs and wonders of the 19th century, the true mirror of a phenomenal era, a volume of original, entertaining and instructive historic and descriptive writings, showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress .. (1899)

Boyd, James Penny, 1836-1910 · Philadelphia, Pa., A. J. Holman & Co · leaf 106

An illustration from Triumphs and wonders of the 19th century, the true mirror of a phenomenal era, a volume of original, entertaining and instructive historic and descriptive writings, showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress .., 1899, leaf 106
it the ray of light that is to be examined;a prism, or a ruled grating that disperses the light, so as to form a spec-trum ; and a view telescope, with which to observe the various parts of thespectrum. By using a small telescope to view the spectrum of the sun, Fraunhofer, aGerman optician, in… … YERKES TELESCOPE, UNIVERSITY OP CHICAGO.Largest in the World. 96 TRIUMPHS AND WONDERS OF THE XIX™ CENTURY from clouds or from the moon or planets, invariably gave the same spectrum;but in no case did light from the stars give a spectrum of the same sort asthat from the sun. Dr. Kirchhoff, of…

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