The following extract from the “People’s Medical Adviser” (London), bearing upon the question, is interesting: “The following is a summary of an account in the New York _Medical Record_, of the first attempt to use a condemned criminal for the solution of an important and scientific question at the Sandwich Islands. It appears that more than two years ago the government procured the services of Dr. Edward Arning, for the purpose of having a thorough and scientific study made of leprosy. Attempts were made to cultivate the _bacillus lepræ_, which is uniformly found in the diseased parts, but not in the blood, by Kock’s method, using various media, but without success. Numerous inoculation experiments upon lower animals were made, but although the bacilli would grow at the points of inoculation for a long time, the animal never became infected. At last Dr. Arning obtained permission to make an inoculation upon a condemned criminal, whose sentence was commuted to imprisonment for life. With the convict’s written consent an inoculation of leprous matter was made in his arm, and bacilli were found in the sore or the scar up to fourteen months after the operation; no constitutional symptoms being observed. One further observation of importance was made by Dr. Arning; he found that in putrid leprous tissues, and even in the body of a leper who had been dead for three months, the bacilli were found in great numbers. This seems to bear against their specific pathogenetic function. Owing to difficulties with the health board, it is stated that it is highly probable Dr. Arning will be obliged to discontinue his work of research. With respect to the cultivation of bacillus, Dr. Neisser, of Breslau, appears to have been more successful than Dr. Arning, for he has recently stated that in a few cases he has observed an exceedingly slow growth, and he also claims to have recognized spores, which the Hawaiian observer has so far failed to do.” I do not consider, however, that these experiments in any way prove the non-communicability of the disease, when we take into consideration the length of time (ten to fifty years) that leprosy takes to destroy the general run of its victims.