416 
DR. 'WILLEMS. 
chain by means of the screw without. This should be carried on 
slowly and under no circumstances should any drawing back of 
the instrument be practised, for this would produce strain upon 
the broad ligament. After both ovaries are extracted, whatever 
blood clots remain in the vagina may readily be removed by the 
hand. 
(To be Continued.) 
NEW RESEARCHES UPON PLEURO-PNEUMONIA AND 
ITS PREVENTIVE INOCULATION, 
By Dr. Willems. 
{Continued jrom page 361.) 
B. The contagion of peripneumonia is again proved by this 
circumstance, that its spreading has been followed from its source 
in the remotest parts of the world. 
Its first appearance, so far as we know its origin, was in 1750. 
This terrible sconrge, which was to prove so disastrous, came from 
the mountains of Switzerland, passing on one side, on the Jura of 
the county of Berne, and on the other on that of France. From 
there it successively spread towards Germany, Holland, Italy, 
Belgium, England, America, &c., and more recently towards the 
Cape of Good Hope and Australia. The dates of the invasion in 
these different countries are well known. 
It is thus that it will appear in others where it is at present 
unknown; for where no diseased animals have been imported, it 
will never be seen. This scourge has been unknown, in all the 
countries where it exists at present, until the introduction of a sick 
animal. Still, in those countries the conditions of climate, of 
stabulation, alimentation, &c., are absolutely the same as those in 
which it prevails as an epizuotic. 
As rinderpest, born in the steppes of Russia, sometimes is 
spread in countries where there is a great trade in cattle, and in 
war times especially, when it follows armies in the places of sup 
