152 Society for Experimental Biology and Medicine. 



platinum was completely precipitated at 1-200, partially at 1-500 

 and not at all at 1-1,000. 



In other words the precipitating power of the serum of the first 

 rabbit, after it received three injections of the colloidal platinum, 

 had increased from 1-100 to 1-1,000 or ten times, whereas for the 

 colloidal silver there was only a very slight increase. Serum from 

 the second rabbit, which received colloidal silver, increased its pre- 

 cipitating power from 1-100 to 1-500, whereas for the colloidal 

 platinum, from 1-100 to 1-250. In both these rabbits there was 

 then an increase in the precipitating power of the serum after in- 

 jection with these colloidal metals, and it would seem that they 

 increased more for the metal injected than for the other. 



Unfortunately both of these rabbits died before I was able to 

 complete this work. Nevertheless I have thought it best to re- 

 port to this society the results of this study, for they seem very 

 interesting. Other animals are undergoing treatment with these 

 and other colloids and I hope that I shall be able to report more 

 fully at our next meeting. 



105 (248) 



Remote results of transplantations of blood vessels. 

 By ALEXIS CARREL. 



[From the Rockefeller Institute for Medical Research .] 



This communication deals first with the evolution of the anas- 

 tomoses, and secondly with the modifications of the walls, of the 

 transplanted vessels. 



The results of the arterio-arterial, veno-venous and arterio- 

 venous anastomoses remained excellent after many months. No 

 stenoses or aneurisms have been observed on the arterial anasto- 

 moses six to seven months after the operation. No stenosis occurs 

 after the venous anastomosis : a cat, in which an Eck fistula was 

 made eighteen months ago by Guthrie and myself is still in good 

 health. The same is the case for the arterio-venous anastomosis : 

 the jugular vein and the carotid artery of a dog were anastomosed 

 by Guthrie and myself twenty two months ago and now strong thrill 

 and pulsations are easily detected by palpation of the jugular vein. 



