AND THE CAUSES OF FERMENTATION. 109 
hay- or turnip-infusion can be inoculated in such 
a manner as to supply us with the information we 
require. In the one case we may employ a drop 
of a turbid ammonic-tartrate solution previously 
heated to 140° F., in which, therefore, the living units 
would certainly be killed; whilst in the other we 
may add another unheated drop of the same turbid 
saline solution to the organic fluid, and then heat 
this mixture also to the temperature of 140° F.. The 
comparative behaviour of these two inoculated fluids 
(placed, in the ordinary manner, in previously boiled 
corked phials) should be capable of showing us 
whether the living elements of the inoculating com- 
pound were able to survive when heated in the organic 
infusion. If they did survive, the fluids inoculated 
in this manner ought to undergo putrefaction earlier 
and more rapidly than those inoculated with the drop 
of turbid fluid, in which we know the Bacteria, | 
Vibriones, and their supposed germs would have been 
reduced to a state of potential death. With the view 
of settling this question, therefore, the following ex- 
periments were made: = 
