PLEURO-PNEUMONIA. 
415 
warm water or sand bath at 100 degrees, so as to prevent gelatiniza- 
tion. In a short time, according to the condition and quantity of the 
lung, a sufficient quantity of clear, yellow colored liquid is obtained. 
Sometimes blood accidentally tinges the material, and this is not neces= 
sarily a disadvantage.” This liquid should be used as described in 
the above quotation from M. Boulay. 
In case it is desirable to preserve the virus for a time, this should 
only be done by hermetically sealing ifl glass tubes ; and, then, before 
using, it is better to examine it with a microscope to see that it has 
undergone no change. As this can only be done by the experienced 
practitioner I will not go into particulars concerning it ; it is merely 
mentioned to put cattle owners on their guard against those pretenders 
who, as Mr. Gamgee says, “ bottle up anything and everything to 
secure a fetid compound.” The fresh liquid should be used if pos¬ 
sible. 
The inoculation should be practiced as soon as there is reason to 
believe the herd has been in danger of infection ; the stables and yards 
should be kept clean and well-littered with straw to prevent dirt, urine 
or manure from getting into the wound. These are the only precau- 
/ 
tions to be observed that have not already been mentioned. 
SAFETY OF INOCULATION. 
I 
I will first give M. Boulay’s experience. After stating that of 728 
inoculated by himself and colleagues none were lost, he says : “ In Bel¬ 
gium the local inflammation which sometimes results at the end of the 
tail no longer terminates in death as formerly, and when the operation 
is performed by certain veterinarians, death is no longer apprehended 
in any case. To avoid danger, they simply recommend an inspection 
of the inoculated part several times a day ; if the swelling is greater 
than usual, or if an unhealthy tumor forms, the tail is at once cut off 
above the inflamed part. This precaution is sufficient to prevent any 
unfavorable termination. When, by neglect of the attendants, the in¬ 
flammation is allowed to reach excessive proportions, deep and long 
incisions are made from above, downward, and cauterized with an iron 
at a white heat.” 
Generally, when the end of the tail drops off, it is without attract¬ 
ing any one’s attention : in the four cases of this kind which M. Boulay 
observed, there was no swelling, and the animals fed well, and were 
fattening at the time. The loss appeared to result from dry gragrene, 
but was so slight as not to change the ordinary appearance of the 
