820 SLE B. C. BKODIE ON THE CALCULUS OF CHEMICAL 0PEBATI0N8. 



Combinations of the Prime Factors a, $, 6, X, x, and u. 



(7) Symbol of Bromine. — ^Two volumes of hydrobromic acid are decomposed into 

 1 volume of hydrogen and 1 volume of bromine. 



Hence, putting a^/S'"' as the symbol of the unit of hydrobromic acid, and a"/3"' as the 

 symbol of the unit of bromine, 



2a'"/3"'=a-fa»/3"', 



and by similar reasoning to that by which the symbols of chlorine and iodine have been 

 ascertained, we have 



Symbol of hydrobromic acid a/3, 



Symbol of bromine . . . es/S^, 



and assuming 80 as the density of bromine, 



w(/3)=39-5. 



Combinations of the Prime Factors a, |, S, X, ^, a, and /3. 



(8) Symbol of Nitrogen. — Two volumes of ammonia can be decomposed into 3 volumes 

 of hydrogen and 1 volume of nitrogen. 



Hence, putting a^v""' as the symbol of the unit of ammonia, and aV' as the symbol of 



the unit of nitrogen, 



and 



whence 



2a"'r' = 3a +«"»»', 

 (a'"i'"'')2=a3aV' ; 

 2j«=3+/i, 2wi=«i, 



