Forensic medicine is an applied science, partly legal, partly medical, calling for information and investigation in widely divergent lines, and becoming more minutely ramified with the progressive advances in medical knowledge and in those sciences of which medicine is itself an application. Its development has been dependent partly upon the slow though progressive tendency of medicine from the condition of an empirical art toward that of an exact science, and partly upon the more rapid and more advanced development of criminal jurisprudence. Medical jurisprudence had reached a high development during the early history of the Roman Empire, and at a period long anterior to the first recognition of forensic medicine. Although the literature of modern medico-legal science is very largely written from the medical point of view and by physicians, its earlier history is to be found in fragmentary form, partly in medical literature, but principally in the writings of historians, in the earlier criminal codes, and in the early records of legal proceedings. In the earliest historical periods the functions now exercised by the priest, the lawyer, and the physician were performed by the same person, who, presumably, made use of what medical knowledge he possessed in the exercise of his legal functions. Among the Egyptians at a very early period it is certain that medical questions of fact were considered in legal proceedings, and that the practice of medicine was subject to legal regulation. According to Diodorus,[2] “when a pregnant woman was condemned to death, the sentence was not executed until after she was delivered.” The same author tells us[3] that “the physicians regulated the treatment of the sick according to written precepts, collected and transmitted by the most celebrated of their predecessors. If, in following exactly these precepts which are contained in the sacred books, they did not succeed in curing the sick, they could not be reproached, nor could they be prosecuted at law; but if they have proceeded contrary to the text of the books, they are tried, and may be condemned to death, the legislator supposing that but few persons will ever be found capable of improving a curative method preserved during so long a succession of years and adopted by the most expert masters of the art.” With the system of legal trial in use among the Egyptians[4] it is difficult to imagine that the question of the existence of pregnancy in the one case, or of malpractice in the other, would not be the subject of contest, and, if contested, determined without the testimony of obstetricians or of physicians.[5] Medical knowledge among the Hindoos was further advanced than among the Egyptians. In the Rig Veda (about 1500 B.C.) occur a few medical references, among which is the statement that the duration of pregnancy is ten (lunar) months.