“In a piece of leg of pork the _Cysticerci_ were found alive in all places not yet putrefied twenty-nine days after the animal had been slaughtered. On the other hand, in the dry muscles of a calf the _Cysticerci_ of the _Tænia mediocanellata_ were all found dead fourteen days after the slaughtering of the animal. I have ascertained that putrefaction of the flesh is fatal for the two larval forms of these different kinds of helminths.” In a subsequent communication received from Professor Perroncito towards the close of the year 1877 he writes: “At the last meeting, held on April 23rd, I made a statement to the Medical and Surgical Society of Turin, of the results of other experiments tried by heating at M. Schulze’s table and by the imbibitions with the neutral tincture of carmine, through which I came to the conclusion that the _Cysticerci_ of the _Tænia mediocanellata_ die sometimes at 44° C., now and then at 45° C., and always at 46° C. I therefore concluded that they could in no case survive at 47° C. and 48° C. when they were maintained at this temperature at least five minutes. But to the end of more fully corroborating the facts I had thus communicated, I, contemporaneously with these, made some breeding experiments with the same _Cysticerci_ on bold and courageous students who generously offered themselves for the benefit of science. “Consequently I am now enabled to state that neither Mr Gemelli nor Dr Ragni contracted the _Tænia_, though each of them had eaten a _Cysticercus_ of the _Tænia mediocanellata_ previously, and respectively subjected to a temperature of 45° C. and 47° C. The larvæ were properly prepared and submitted to gradual heating on the above-mentioned table, and swallowed when they no longer gave signs of life. In like manner no generation of the _Tænia_ took place in the body of Mr Martini, who ate the _Cysticercus_ brought to a temperature of 44° C. It was maintained at this degree of heat during a period of about three minutes, and swallowed whilst a very slight movement was still visible in a portion of its neck. “In another student, on the contrary, who ate a living _Cysticercus_ of the _Tænia mediocanellata_, the tapeworm reached its maturation in fifty-four days and eliminated the two first proglottides. It threw off two more on the fifty-eighth day, and thirty on the sixtieth. Sixty-seven days after swallowing the _Cysticercus_ this courageous young man, having, like his three companions, taken some kousso and castor oil, emitted the strobila. It was furnished with 866 rings, but destitute of the neck and head. Its measurement afforded a total length of 4·274 mètres.