BAKER, Henry Brooks, surgeon, born in Brattleborough, Vermont, 29 December 1837. He received a common-school education, and studied medicine at the University of Michigan in 1861-'2. He served through the civil war with the 20th Michigan infantry, and from July 1864, was its assistant surgeon. He was graduated at Bellevue Hospital Medical College in 1866, and then began to practice in Lansing, Mich., where he has since performed important operations. In 1870 he took charge of the vital statistics of Michigan, and in 1878 he became secretary of the State Board of Health. In his official capacity he has edited and published "Statistics of Michigan "(Lansing, 1870), " Vital Statistics of Michigan," registration reports (1870-'6), and the "Reports of the State Board of Health" (1872-'85). His own papers, which are quite numerous, principally on sanitary subjects, have appeared in various medical journals, chiefly those of Detroit. Dr. Baker has devoted much time to studies relative to the causation of diphtheria, typhoid fever, cholera, and pneumonia. The results thus far obtained have appeared in the "Transactions of the American Public Health Association" and "Transactions of the American Climatological Association," 1886. He is a member of the American Climatological Association, the Royal Meteorological Society of England, and the French Society of Hygiene.