Excerpt: ...at Harvard. Born at Boston, and educated at the Lawrence Scientific School, his first work was in the field of physics, but in 1876, he was appointed professor of astronomy and geodesy, and director of the Harvard observatory, which, under his management, has become of page 199 the first importance. His principal work has been the determination of the relative brightness of the stars, and many thousands have been charted. On the death of Henry Draper, the study of the spectra of the stars by means of photography ...

American Men of Mind 2017, Pinnacle Press

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American Men of Mind 2016, Wentworth Press

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American Men of Mind 2015, Createspace Independent Publishing Platform

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American Men of Mind 2010, Nabu Press

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American Men of Mind 2010, Nabu Press, Charleston SC

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American Men of Mind 2009, BiblioLife, Charleston SC

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American Men of Mind 2007, Kessinger Publishing, Whitefish MT

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