MAKUAL OF CATTLE-FEEDING. 



127 



latory protein, is also indicated "by more direct experiments 

 wliicli have lately been made. 



If by any means it were possible to introduce into the 

 body of an animal which had been deprived of food long 

 enough to destroy its circulatory protein, albuminoids in 

 the form of a living organ from another animal, we should 

 expect that, according to Yoit's theory, these albmninoids 

 would be but slowly destroyed in the body. Forster * at- 

 tempted to accomplish this by the transfusion of blood, 

 and found that the protein of living blood, which may be 

 regarded as organized, was but slowly destroyed in the 

 system, while simple solutions of albumin produced an 

 immediate and considerable increase in the excretion of 

 urea. It is noticeable, however, that his results show that 

 albumen thus injected seems to be more slowly decom- 

 po^ tlian that taken in Urn f ood- 



Tschieriewf ha^ compared the behavior ^f transfused 

 blood with that introduced into the stomach, with the fol- 

 lowing results ; 





Nitrogen given. 

 Grms, 



Nitrogen excreted. 

 Grms. 



Blood fed •*. 



18.19 

 19.09 

 14.38 

 0.00 

 18.53 



14.55 



*' transfused. .,., 



^.m 



** fed, 



No food. t 



1443 

 4.65 



Blood taransftised 



10.60 



These figures show plainly that the albuminoids of the 

 blood, after they had passed through the digestive appa- 



* Zeitschrift fur Biologie, XL, 496. 



f Biedermami's ' Central -Bkitt fur Agr. Chem.,' X, 98. 



