134 
EXPERIMENTAL PATHOLOGY. 
the diameter of a myeline fibre.' These spherical grains are 
arranged without marked order, and do not form ehapelets. 
In cultivating the rabid brain, tliess elements are found in the 
sediment of the cultures. And if this sediment is inoculated be¬ 
fore the fifth day, it gives rise in some cases to rabies, but with an 
incubative stage of some length. After the sixth day the inocu¬ 
lation of the cultures remains negative.— Ibid. 
EXPERIMENTAL PATHOLOGY, 
UPON THE PRESENCE OF MICRO-ORGANISMS IN THE LIVING 
TISSUES OF HEALTHY ANIMALS. 
By M. Hauser. 
Mr. Hauser has made experiments as follows: 
Healthy animals were destroyed by a violent blow on the 
poll. Then, observing strictest and most perfect antiseptic pre¬ 
caution, the operator would skin the animal while still warm, and 
remove with sharp instruments, heated by fire, pieces of flesh and 
of different organs. These anatomical specimens were then pre¬ 
served in previously heated recipients, containing either air or 
gases which had been filtered through either wadding or water, or 
bouillons of culture previously sterilized. After remaining some 
time in these media, the pieces taken from the organs were taken 
out and examined for the possible presence of micro-organisms, 
the water and the liquids being similarly treated. The results led 
him to the following conclusions: 
1st, In the liquids and tissues of healthy living animals there 
exist no germs either of putrefaction, or any other species of 
bacteria. 
2d, When they are kept from contact with all schizomycetes, 
tissues of animal, preserved in air, in gases, such as oxygen, hy¬ 
drogen or carbonic acid, or in water and bouillons, they undergo 
regressive changes, analogous to those observed in the tissues of 
the living body, when these are attacked with necrosis, consecu¬ 
tive to simple troubles of nutrition, and with any bacterial influ¬ 
ence. 
3d. The products of decomposition, resulting from the dissocia¬ 
tion of tissues, in the above mentioned condition, are free from 
any pathologenic properties.— Ibid. 
