Medical observers differ in opinion on this singular yet well-authenticated phenomenon. Lair, Vicy d'Argou, and Dupuytren maintain that to produce it, the contact of fire is necessary. Le Cat and Kopp, on the contrary, affirm that this combustion may be spontaneous without the intervention of any external agent, and resulting from some peculiar predisposition. According to Le Cat animals contain inflammable substances which ignite of themselves. De Castro relates the cases of several individuals from whom friction could draw sparks. Daniel Horstius mentions a gouty patient, from whose limbs, on being rubbed, vivid sparks arose. These physicians consider that these electric sparks are sufficient to ignite the spirituous liquor which may have saturated any organic tissue of the body, the combustion being afterwards fed by animal oil. This theory is, however, subject to many objections. It is difficult to imagine that any substance introduced into the organ of digestion should retain its former principles of inflammability. Although Cuvier and Dumeril relate, that in opening the body of a man who died from excess of drinking, the effluvia of the liquor arose from every cavity. On this subject, fraught with much interest, nothing positive has been ascertained, despite the late progress of chemical investigation. This combustion indeed differs widely from all other burning; sometimes a flickering and bluish flame arises; at other times a smothered heat or fire, without visible flames, is the consuming agent. Water increases the combustion instead of allaying it. It is moreover a well-known fact, that a considerable quantity of fuel is required to consume a dead body, whereas in this combustion, incineration is most rapid. The human body, indeed, is not easily consumed; a case is related of a baker-boy, named Renaud, who was sentenced to be burnt at Caen; two large cart-loads of fagots were required to consume the body, and at the end of more than ten hours, some remains were still visible. The extreme incombustibility of the body was singularly exemplified in the case of Mrs. King, whose murderer was engaged for several weeks in endeavouring to burn her remains without effecting his purpose.