114 



Scientific Proceedings (29). 



Sections of a cat's aorta placed in the carotid of a dog, showed at 

 the end of twenty days a very slight loss of elastic tissue, with the 

 beginning of a break down of the individual muscle fibers, and 

 proliferation of new fibrous connective tissue. 



These observations of the behavior of the elastic tissue add 

 weight to the general proposition that the cells of vessels trans- 

 planted from one animal to another of a different species do not 

 actually survive, but are gradually broken down and absorbed, 

 this process usually being slow enough to allow of sufficient new 

 fibrous connective tissue formation (probably by the tissues of the 

 host) to permit the function of the vessel to be maintained for a 

 considerable period of time at least. The ultimate fate of such 

 transplanted segments can be determined only by more protracted 

 experiments. 



69 (325) 



Note upon the supposed presence of a gastric hormon 

 in the salivary glands. 



By A. S. LOEVENHART and D. R. HOOKER. 



\From the Physiological Laboratory of Johns Hopkins University. ,] 



There was published in the Proceedings of this Society in June 

 of last year 1 a statement of the results of clinical and experimental 

 observations upon the influence of the salivary glands on the secre- 

 tion of normal gastric juice. It was stated that in four cases of 

 Mikulicz's disease, uncomplicated, no gastric juice was secreted 

 during the disease. The experimentally analogous condition 

 brought about by removal of all the salivary glands in dogs also 

 gave the same result, namely, a permanent stoppage of the normal 

 gastric secretion. It was stated that when food, insalivated by other 

 healthy dogs, was given to such animals no flow of gastric juice 

 followed. If, however, extracts made of salivary glands from 

 normal dogs, were injected, eitherintravenously or intraperitoneally, 

 a temporary resumption of gastric secretion occurred after, as well 

 as before, section of all extrinsic nerves to the stomach. The 

 author, as the result of these observations, concluded that the nor- 

 mal gastric secretion depends in part upon an internal secretion of 

 the salivary glands. 



1 Ilemmeter: This Journal, 1907, iv, p. 153. 



