Rood, Ogden Nicholas

Rood, Ogden Nicholas

(1831–1902) physicist; born in Danbury, Conn. After postgraduaate study in England and Germany, he taught at Troy University (1858–63) before joining Columbia University (1864–1902). He devised a photometer independent of color, was the first to use photography in microscopy, and made major contributions to electrical conductivity and insulators. An accomplished painter, his book Modern Chromatics (1879) was an important influence on both physics and impressionism.