“10th. Two individuals of Tænia perfoliata of the horse died, the first at 45° C., the second at 50° C.
“11th. The embryos of the Filaria microstoma of the horse began to stand still at 46–47°, and all died at 48° C.
“12th. The embryos of the Filaria megastoma of the horse’s stomach died at 47° C.
“13th. The Trichina spiralis, both free and in a cyst, in several experiments always died at 48° C.
“14th. The embryos of the Strongylus filaria of the sheep stood still at 50° C.
“15th. Probstmayer’s viviparous oxyurids, the infusoria of the colon and cæcum of the solipeds, and the psorosperms of the liver of the rabbit did not stir at all.
“Each experiment lasted about ten minutes, and the temperature rose from 8–10° C. to 45–46° C. in six to eight minutes; and from 46° to 50° in one minute. These experiments have a great value, both scientific and practical, as they show, on one side, which is the lowest intensity of heat sufficient to kill always the Cysticercus, the Trichina, and other parasites, reducing thus by far the tenacity of life generally attributed to a large number of Helminths and corresponding larval forms. They assure us, moreover, of the harmlessness of the flesh infected by the above-mentioned parasites, when it is cooked in such a manner as to reach the temperature of 50° C. over all points of the pieces, even though it be kept at such a degree of heat not longer than five minutes.
“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: