342 STUDIES ON RESPIRATION. XIV 



SUMMARY. 



1. Concentrations of La(N03)3 up to 0.000025 m have little effect 

 upon the rate of respiration of Bacillus suhtilis; at 0.000006 m there 

 is an increase in rate, while in higher concentrations there is a decrease 

 in rate. 



2. There is well marked antagonism between La(N03)3 and NaCl, 

 and very slight antagonism between La(N03)3 and CaCl2. 



3. It requires a very small amount of La(N03)3 to antagonize 

 NaCl, the proportions of the two salts at their maximum antagonism 

 being 99.8 parts of NaCl and 0.2 parts of La(N03)3. 



