Joseph K. Barnes (July 21, 1817 – April 5, 1883) was an American physician and the 12th Surgeon General of the United States Army (1864–1882).Born in Philadelphia, Pennsylvania, to a prosperous Federal judge, Barnes studied medicine at Harvard University, but left before finishing his studies due to ill health. He later studied medicine with Surgeon General Thomas Harris of the United States Navy, and received his medical degree from the University of Pennsylvania in 1838. After graduation, he served a year as resident physician at Blockley Hospital and for another year as visiting physician for the northwestern district of Philadelphia. Wikipedia
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