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Rood, Ogden Nicholas

physicist, educator, author, was born Feb. 3, 1831, in Danbury, Conn. He is a physicist of note, professor of physics at Columbia college from 1863; and author of Modern Chromatics.

ROORBACH, ORVILLE AUGUSTUS, journalist, author, was born Jan. 20, 1803, in Red Hook, N. Y. He published Bibliotheca Americana from 1820 to 1861. He died June 21, 1861, in Schenectady, N. Y.

ROOSA, DANIEL BENNETT ST. JOHN, physician, educator, author, was born April 4, 1838, in Bethel, N. Y. He is a prominent physician of New York city, and a professor at the university of the city of New York in 1863-82. He is the author of Treatise on the Ear; A Doctor's Suggestion; and On the Necessity of Wearing Glasses.