Early in 1771 Mr. Hunter published his first work of any magnitude, the first part of his “Treatise on the Natural History of the Human Teeth,” which long continued a standard work, largely appropriated by subsequent writers. The second part, treating of the diseases of the teeth, did not appear till 1778. In 1772 he made his mark at the Royal Society by his celebrated paper on the digestion of the stomach after death, which he attributed to the action of the gastric juice upon the dead tissues. His stores of knowledge and learning were afterwards made evident by many papers in the “Philosophical Transactions,” of which the principal were those on the torpedo (1773), on the air receptacles of birds, and on the Gillaroo trout, 1774; the production of heat by animals and vegetables, 1775; the recovery of persons apparently drowned, 1776; the communication of smallpox to the fœtus in utero, 1780; the organ of hearing in fishes, 1782; the specific identity of the wolf, jackal, and dog, and on the structure and economy of whales, 1787; observations on bees, 1793; and on some remarkable caves in Bayreuth, and fossil bones found therein, 1794. The titles of these papers, however, convey but a very imperfect idea of the wide range of subjects treated in them. When he described a structure, he made it the starting-point of a dissertation, in the course of which he brought to bear all his vast stores of knowledge to establish general principles or to illustrate important points of physiology.