BORON. RAMSAY. 153 



To obtain the true excess on the atomic weight n, we 

 must divide the excess of the mean, by the change per tenth; 

 the quotient will be in units of first decimal place. 



The results so obtained are stated in the above table 

 under the head of: atomic weight, mean excess. 



A mere glance at this column shows that the chloride 

 and bromide give great deviations, that for the sulphide 

 being smaller; only the carbide gives less than a hundredth. 



In this connection we must bear in mind, that the pro- 

 cess the barium sulphate process used for the sulphide, 

 notoriously is analytically very dull and atomically also; 

 2 units in the fifth place corresponding to o.oi on the 

 atomic weight. 



The chloride process is atomically as dull, and the sub- 

 stance not directly weighable in the sense of Berzelius. 



The bromide process is even twice as dull, atomically, 

 and the bromide equally unweighable. 



My Carbide Process. 



This leaves only the Carbide Process atomically most 

 sensitive of all, and indeed, one of the most sensitive pro- 

 cesses in chemistry; but only two determinations were 

 made, and these on very small amounts of substance. 



Accordingly there is absolutely nothing in this research 

 of H. Gautier made under Moissan, and so highly honored 

 by the Academy of Sciences at the direct recommendation 

 of the same Moissan, that we must repell the declaration or 

 official imputation that this research is even comparable to 

 that of Ramsay. 



Tested by our methods, which were publicly taught in 

 the halls of the University of Paris by Schutzenberger under 

 the presidency of Friedel as far back as 1896. (Actualites 

 Chimiques, pp. 4-17; 1896, also his standard work: Chimie 

 Generale, Paris, 1898, pp. 143-152), and repeatedly repre- 

 sented in the Comptes Rendus and in my work "The True 

 Atomic Weights, 1894," so well known at Paris, we find 

 nothing (with one exception) in either the method of work 



