82 Correspondence of J. Nickles. 
their support have been observed by Professor Montegazza 
the University of Pavia. 
‘'wo female frogs were quickly killed, by the destruction 
i o glass v w 
the spinal marrow, and place 
to the air for an hour or more, and that the air was renew 
each observation. Germs could, then, easily fallin; and yet 
results were very different in the two cases. | 
The following are the observed results :-— 
depend much more upon the progress of the putrefaction tha 
upon the amount of putrescible matter. The more simple 
cies always appear first. 
_ 5. The production of species of Bacterium takes place 
times during the course of a long putrefaction. 
6. When the liquid presents a new fauna, the new species # 
from the outset represented by a number of individuals at ont 
from one day to the next, they are simultaneously produced. — 
__ 7. In the course of a long»putrefaction, there are some ge! 
tions which endure for some days; others exist for a much lo! 
8. | 
iquibades 
mal and e, 
9. When circumstances are little favorable to heterogen, 
ie ik m ey ea eae 
