82 Biological Section, American Chemical Society [Oct. 



form of ammonia nnder the same conditions. Ammonium sulfate 

 is unaffected. 



The non-development of cytolytic sera following the intra- 

 venous injection of mould spores. A. F. Blakeslee and R. A. 

 GoRTNER. {The Carnegie Institution of Washington.) Intraven- 

 ous injections of the spores of each race of Miicor "V" were given 

 to rabbits, rabbit No. 5 receiving 30 injections of the J* race and 

 rabbit No. 55 receiving 29 injections of the ? race. Each injection 

 averaged about 500,000,000 spores. Following the last injection 

 of approximately 800,000,000 spores, a loop of blood was taken at 

 intervals of 30 minutes for 6 hours, then every hour for 4 hours 

 more, then every 2 hours for 16 hours more, and later at less fre- 

 quent intervals. Separation cultures were made of agar which 

 contained the loop of blood taken and the number of mould colonies 

 which developed were counted. A similar test was made at the 

 same time, using rabbits which had received their first injection of 

 the spores. In each case the disappearance of the spores occurred 

 after about 43 hours, the immunized rabbits retaining the viable 

 spores as long as the control rabbits. 



Effect of acids upon the catalase of taka-diastase. Ray E. 

 Neidig. {Chemical Section of the Iowa Agriciiltural Experiment 

 Station, Ames.) Data were presented showing the inhibiting effect 

 of several of the important inorganic and organic acids on the 

 action of the catalase of taka-diastase. Curves were plotted, for 

 different acid concentrations, which show the quantity of oxygen 

 liberated at stated intervals. The acids, arranged in order of the 

 magnitude of their inhibiting effect for equi-normal Solutions, are as 

 f ollows : sulfuric, h3^drochloric, oxalic, tartaric, citric and acetic. 

 The inhibiting effect of the first three was much more pronounced 

 than that of the others. Neutralization of the acid Solution usually 

 restored some of the activity, the amount of increase depending 

 upon the particular acid used. Van Slyke's amino-nitrogen appa- 

 ratus was used in these experiments for measuring the amount of 

 oxygen liberated. 



Polyatomic alcohols as sources of carbon for molds.^ Ray 

 E. Neidig. {Chemical Section of the Iowa Agricultural Experi- 



2 Neidig : Jour. Biol. Chem., 1913, xvi, p. 143. 



