CORRESPONDENCE. 
231 
2. That these symptoms are produced with absolute certainty 
when the method of inoculation is by trephining the skull and in¬ 
jection under the dura mater; with less certainty when the inocu¬ 
lation is by subcutaneous injection. 
3. That the strength of this virus is lessened when the cords 
containing it are removed from the animals and placed in a dry 
atmosphere at an even temperature. 
4. That the symptoms produced by inoculation of this virus 
only appear at a certain period of incubation, distinctly shorter 
when the inoculation has been done by trephining than when done 
by subcutaneous injection. 
5. That injections of the virus modified in strength by drying, 
and in the manner prescribed by Pasteur, exert a very marked 
protective influence against an inoculation with virus of full 
strength. 
6. That a very moderate degree of heat destroys the power 
of the virus entirely, whilst prolonged freezing does not injure 
it.— Therapeutic Gazette. 
CORRESPONDENCE. 
VETERINARY LITERATURE. 
Editor American Veterinary Review: 
I have never before sought the columns of your publication 
with suggestion or complaint. In fact I have only recently 
stepped upon the arena of veterinary science, and it seems to me 
to be both prudent and wise, not to say modest and in good taste, 
that the younger members of the profession should rather study 
the experiences and conclusions of the older practitioners, and 
endeavor to gain wisdom from their words as they detail them 
through our periodicals and text-books. This I try to do, and 
while I felt certain that there is sufficient in the veterinary litera¬ 
ture of to-day to occupy the thoughts and ambition of the average 
veterinarian, yet one is apt to form a preference in reading, and 
