In 1837, Holmes was appointed to the Boston Dispensary, where he was shocked by the poor hygienic conditions. That year he competed for and won both of the Boylston essay prizes. Wishing to concentrate on research and teaching, he, along with three of his peers, established the Tremont Medical School—which would later merge with Harvard Medical School—above an apothecary shop at 35 Tremont Row in Boston. There, he lectured on pathology, taught the use of microscopes, and supervised dissections of cadavers. He often criticized traditional medical practices and once quipped that if all contemporary Medicine was tossed into the sea "it would be all the better for mankind—and all the worse for the fishes". For the next ten years, he maintained a small and irregular private medical practice, but spent much of his time teaching. He served on the faculty of Dartmouth Medical School from 1838 to 1840, where he was appointed professor of anatomy and physiology. For fourteen weeks each fall, during these years, he traveled to Hanover, New Hampshire, to lecture. He was elected a Fellow of the American Academy of Arts and Sciences in 1838.