American author and physiologist, born in Concord, MA, on the 9th of January 1803; was graduated at Harvard in 1826, and practiced medicine in Massachusetts, where he became well known as an authority on insanity. In 1852 Dr. Jarvis became president of the American Statistical Association, and in this capacity prepared a large number of reports and tables on public health, longevity, mortality-rates and other matters pertaining to state medicine. He also wrote Practical Physiology (1848); and Primary Physiology (1849). He died at Dorcester, MA, on the 31st of October 1884.