284 



Society Proceedings (122). 



was used, sufficient amounts of this product being generously 

 furnished by Dr. I. Harris. 



Intravenous injections of a neutral aqueous solution of this 

 product into dogs showing severe nervous symptoms (clonic 

 spasms, etc.) due to a lack of vitamin-B resulted in a complete 

 cessation of such symptoms, in one instance within a half hour, 

 and in another case within three hours after the injection. In a 

 third instance the relief from symptoms occurred after a longer 

 period. An intravenous injection of the vitamin-containing 

 product was also made into an animal which had lost its appetite 

 after subsisting on the vitamin-free food for a period of days but 

 which showed none of the nervous symptoms characteristic of 

 vitamin-B deficiency. The injection was followed by a complete 

 recovery of appetite which lasted six (6) days. 



Intraperitoneal injections were also made. Such an injection, 

 while bringing about relief from nervous symptoms in all cases, 

 did not prevent death from supervening from ten (10) to twelve 

 (12) hours later in those instances where large amounts of material 

 were injected. A control injection into a normal animal resulted 

 in phenomena indicating that the fatal outcome in the instances 

 cited was probably due to the too sudden introduction of large 

 amounts of material and the effect of this procedure on the tissues 

 within the peritoneal cavity. 



The effect of subcutaneous injections into such animals will 

 be studied shortly. 



125 (1872) 



The conductance of unicellular organisms. 



By S. C. BROOKS.i 



[From the Division of Pharmacology, Hygienic Laboratory, U. S. 

 Public Health Service, Washington, D. C] 



The electrical conductance of bacteria (B. coli and B. butyricus) 

 unicellular algai (Chlorella sp.) yeasts (Saccharomyces sp.) and 

 mammalian red-blood cells has been studied by a method which 

 yields figures for the gross conductance dependable within 1/10 per 



1 Approved for publication by the Surgeon General. 



