( 304 ) 



does not agree with our Bumber; neither is our value of No to 

 be composed from Perkin's atomic values. 



If following Perkin we take in COo for 1 atom carbon 0.515, 

 we find O3 = 0.323, which would be more agreeable to the value 

 0.39, which HiNRlCHS^) deduced from organic acids. Taking everything 

 together the agreement is fairly well, except for nitrogen. 



') HiXKiciis. C. E. 113, p. .500 (1S91). 



(February 28«l 1899.) 



