chemist and a physicist, was born in 1835 and graduated from Yale in 1858 and later in medicine from the Albany Medical School. He held various positions, including the chair of physiological chemistry at Yale until 1873, when he became professor of physics at the University of Pennsylvania, and for thirty-seven years, latterly as professor emeritus, held a leading position in the university, when Philadelphia had a more dominant position in science than it has been able to maintain. Professor Barker was an admirable lecturer and the author of widely-used text-books of chemistry and physics; he served as expert in important legal cases and carried forward research work of consequence. He was elected to the National Academy in 1876 and was president of the American Association for the Advancement of Science in 1879.
General Comstock, born in 1831, graduated from West Point in 1855 and taught physics in the academy.
