706 
EXTRACTS FROM EXCHANGES. 
experiments of U. proved, that the inoculated animals withstood, 
without any bad effects, the inoculation of a dose of virulent 
blood, which was taken from animals which suffered from a 
severe attack of this disease, most of which died from the dis¬ 
ease. . These experiments are of great importance, as it is the 
first time that it has been found possible to inoculate against a 
disease caused by a haematozoon. The experiments will be re¬ 
peated during the following months in Alfort, and the Societe 
Centrale de Medecin \ eterinaire, appointed a commission, con¬ 
sisting of Messrs. Moussu, Mollereau, Nocard and Railliet, to 
report the results of the investigations. We are indeed especially 
anxious to hear these reports, as the disease is claimed to be the 
same as Texas fever, the dreadful malady which annually 
causes an immense financial loss in the United States. At the 
same time, the Bureau of Animal Industry, to which all the 
credit is to be given for these investigations as to the etiology 
of Texas, fever, is now at work experimenting, to obtain an 
immunizing serum, and it should not at all surprise us to hear 
in the near future of their success in this direction. 
Contribution to the Study of the Internal Secre¬ 
tion of THE Testicle [By Pruneau] .—P. distinguishes in 
the testicle a secretion which is emptied to the outside, the 
semen, and one which is reabsorbed, having on the system a 
certain function. To study the influence of the internal secre¬ 
tion on the system, P. performed different experiments on rab¬ 
bits, guinea pigs and dogs, in which (a) the vas deferens was 
cut out, ligated or severed, (b) the animals castrated, (c) con¬ 
trol animals of the same race not operated upon. The animals 
which we*e tieated in this manner were carefully observed, 
their daily increase in weight, the secretion of urine, with the 
other excrements, also the general metabolism, and found the 
following: (i).The testicles and the production of the semen is 
not influenced in any way by the ligation of the vas deferens. In 
dogs when ardent the testicle became enormously swollen, 
which, in the lapse of a few days, regained their normal size. 
On the piostrate no atrophy could be noticed. (2) In cases 
where the vas deferens was cut through a slight decrease of the 
urine excreted was noticed. (3) In old guinea pigs a marked 
atrophy of the vesiculse seminalis was observed, in cases where 
the vas deferens was severed. (4) The daily amount of the 
excreted urea, and also the whole amount of nitrogen, is de¬ 
creased after this operation. Therefore the metabolism is some¬ 
what slower. (5) In young animals following this operation, 
