Coolidge, Sidney
scientist, was born in 1830 in Boston, Mass. After working in the nautical-almanac office and in the Cambridge observatory, he was appointed in 1853 assistant astronomer to Commodore Perry's Japan exploring ex- . pedition. Being in Mexico in 1858, he took part in the civil war of that year.
He took part in an Arizona land survey in 1860, and in 1861 became major in the sixteenth United States infantry. He was superintendent of the regimental recruiting service in 1862, commanded regiments at different posts and camps, and was engaged at the battles of Hoover's Gap and Chickamauga, where he was killed. For his services in the latter figut he received the brevet of lieutenant-colonel. He died Sept. 19, 1863, near Chickamauga, Ga.