These results are quite in harmony with the observations and experiments of M. Pouchet and of Professor Wyman, as to the capability of resisting heat displayed by _Vibriones_ and all kinds of ciliated infusoria. According to the former,[39] the majority of ciliated infusoria are killed at, or even below, the temperature of 122° F., whilst large _Vibriones_ are all killed at a temperature of 131° F.[40] According to the observations of Professor Wyman, the motions of all ciliated infusoria are stopped at less than 130° F., whilst _Vibriones_, taken from the most various sources, also seemed to be killed at temperatures between 130°–136.4° F. Similarly, we find Baron Liebig quite recently making the following remarks concerning a species of _Torula_:--“A temperature of 60° C. [140° F.] kills the yeast cells; after exposure to this temperature in water, they no longer undergo fermentation, and do not cause fermentation in a sugar solution.... In like manner, active fermentation in a saccharine liquid is stopped when the liquid is heated to 60° C., and it does not recommence again on cooling the liquid.” [39] ‘Nouvelles Expériences,’ etc., 1864, p. 38. [40] ‘American Journal of Science and Arts,’ Oct. 1867. That the organisms in question--being minute naked portions of living matter--should be killed by exposure to the influence of a fluid at these temperatures will perhaps not seem very improbable to those who have attempted to keep their fingers for any length of time in water heated to a similar extent. With watch in hand I immersed my fingers in one of the experimental beakers containing water at 131° F., and found that, in spite of my desires, they were hastily withdrawn, after an exposure of less than _five-and-twenty seconds_.