CORRESPONDENCE. 
To Readers of the American Veterinary Review: 
I wish to suggest to readers of the Review, who may have 
it in mind to do some experimental work with our V. B. Vac¬ 
cination against hog cholera (see American Veterinary 
Review for November, 1910, and January, 1912), that you 
observe especially and record any reliable data concerning the 
duration of the immunity conferred upon very young pigs. 
We would appreciate very much any information concern¬ 
ing your observations on this point. 
Future experience may easily show it desirable as a routine 
procedure to reinforce the original immunity after an, as yet, 
unknown period. If found advisable, this could be done at a 
slight cost. 
M. H. Reynolds, 
University Farm, Saint Paul, Minn. 
Go wanda, N. Y., May 6, 1912. 
Editors American Veterinary Review, New York: 
I noticed in the case reports in the May number a case of 
irregular parturient paresis in a cow. I had two similar cases 
in my practice in 1909, the first one being in April, the patient 
being a six-year-old Jersey due to calve in August. My first 
call was about 7 a. m., finding the animal with all the symptoms 
of milk fever, and would have diagnosed it as such but for the 
history. I gave half a grain strychnine sulphate hypodermically 
and left a prescription for nux, digitalis and gentian, to be 
given every two hours. Late that night, there being no improve¬ 
ment, I decided to inflate the udder. At 3 a. m. cow was up 
eating and apparently as well as ever. There was no recurrence. 
To Case No. 2 I was called about 8 a. m., the owner inform¬ 
ing me that he thought the cow had a bad sprain or broken limb. 
Finding no such trouble on examination, I concluded it a parallel 
of Case No. 1, and inflated the udder, also giving a stimulating 
treatment as before. This was in June, the cow having calved 
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