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Bartlett, William Francis

soldier, was born Jan. 6, 1840, in Haverhill, Mass. He served in the civil war as captain of the 57th Massachusetts volunteers, and was promoted brigadier-general for gallant and meritorious conduct. He died Dec. 17, 1876, in Pittsfield, Mass.

BARTLETT, WILLIAM HOLMS CHAMBERS, scientist, author, was born in 1809, in Lancaster, Pa. He was a prominent scientist, who was from 1834- 71 an instructor at West Point. He was the author of Treatise on Optics; Analytical Mechanics; and Spherical Astronomy. He died in 1893. BARTLETT, WILLIAM PITT GREEN- WOOD, mathematician, author, was born Oct. 27, 1837, in Boston, Mass. He became one of the corps of computers for the Nautical Almanac. He published several papers on the elements of quaternions in the Mathematical Monthly, and on interpolation in the Memoirs of the American Academy. He died Jan. 13, 1865, in Cambridge, Mass.