8IE B. C. BEODIE ON THE CALCULUS OF CHEMICAL OPEEATIONS. 



819 



Combinations of the Prime Factors a, |, tf, X, and %. 



Name of substance. 



Chlorine 



Hydrochloric acid 



Protoxide of chlorine 



Teroxide of chlorine 



Tetroxide of chlorine 



Hypochlorous acid 



ChloroTis acid 



Chloric acid 



Perchloric acid 



Hydrate of chlorine 



Protosulphide of chlorine . . 

 Bisulphide of chlorine .... 



Biselenide of chlorine 



Tetrachloride of selenium . . 

 Chlorosulphurous acid . . . , 

 Hydrochlorosulphurons acid 

 ChloroBulphuric acid 



Prime factor. 



Symbol. 



Absolute weight, 

 in grammes. 



1-542 



3173 

 1-631 

 3-888 

 5-319 

 6-034 

 2-346 

 3-062 

 3-777 

 4-492 



11-219 

 4-604 

 6-034 



10-325 

 9-922 

 5-319 

 5-207 

 6-034 



Relative weight. 



17-23 



35-5 



18-25 



43-5 



59-5 



67-5 



26-25 



34-25 



42-25 



50-25 



125-5 

 52-5 

 67-5 



115-5 



111 

 59-5 

 58-25 

 67-5 



(6) Symlol of Iodine. — ^Two volumes of hydriodic acid are decomposed into 1 volume of 

 hydrogen and 1 volume of iodine. 



Hence, putting a'^of"^ as the symbol of the unit of hydriodic acid, and a"<i»"' as the 

 symbol of the unit of iodine, 



and 



and 



2m=l+w, 2wi=OTi, 



m=l, mj = l, 



n=l, Wj=2, 

 a minimum. 



Assuming the density of iodine vapour to be 127, 



l+2w(«)=127, 



«;(»)= 63, 



and the symbol of hydriodic acid is uu, and of iodine aa;^, in which case the abo^e 



equation is thus expressed, 



2aft*=a-|-aft;^. 



