The Biographical Dictionary of America/Ainsworth, Frederick Crayton

AINSWORTH, Frederick Crayton, soldier, was born at Woodstock, Vt., Sept. 11, 1852; son of Crayton and Harriet (Carroll) Ainsworth; grandson of Roswell Moulton Ainsworth, and a descendant of Edward Ainsworth of England, and Woodstock, Conn. He received the degree of M.D. at the University of the city of New York, and was appointed from Vermont assistant surgeon in the U.S. army, Nov. 10, 1874. He was promoted assistant surgeon with the rank of captain, Nov. 10, 1879; surgeon with the rank of major, Feb. 27, 1891; chief of the record and pension office with the rank of colonel, May 27, 1892, and chief of the same with the rank of brigadier-general, March 2, 1899. He devised and introduced the index record card system by means of which all military and medical records are immediately available.