266 ANTIMONY. 



KaO Sb, C4 H4 06 323, Ka 1 74.5; hence, 

 Chloride : anhydr. Tartrate = o.23 049. Change 10 low. 



Aided by G. C. Friend, eight determinations were made, 

 ranging from 041 to 049, and from 24 to 16 low; mean ana- 

 lytical excess 17.3 low, corresponding to Sb = 120.17. 



Accordingly, this result agrees with the chemical estimate 

 of the process (ratio low, hence atomic weight high). 



It is a valuable process, and deserves to be worked with 

 great care. 



It is very much to be regretted that only the values 

 reduced to vacuum are given (see pp. 229-230) ; we cannot 

 rely except on direct weighings. 



I am much obliged to Professor Smith for fhe reprint 

 (from Journal American Chemical Society, XXIII, 502-505 ; 

 July, 1901), kindly sent me. 



Of course, since Prof. Smith uses the false atomic weights 

 of Clarke, he finds Sb 120.353; since he spares us the 

 probable error, we will overlook the third decimal. 



The false Clarke auxiliaries just doubles the error of this 

 work of E. F. Smith. 



The other determinations will be given in our abbreviated 

 form; our atomic ratio standing first; R signifies range. 

 Electrolysis : 

 1.25 984, Sb2 : Cua, Pfeifer, 1881 : 



3 Det., R 36. Mean 2275 high. 

 o-37 037, Sb : Ags, Pfeifer, 1881 : 



7 Det., R 171. 448 high. 



o-37 037> Sb : A 3 - Popper, : 



15 Def, R 253. 397 high. 



Silver Processes, gravimetric determinations : 

 0.63 830, Sb Bra : 3 Ag Br, Cooke, 1877 : 



15 Det., R 188. " o 

 0.71 064, Sb loa, Cooke, 1877, 7 Det., R 209. " 4 low. 



Titrations: Dexter, 1857; Dumas, 1859; Kessler, 1861 

 lead to Sb 122, generally received till 1877. Bongartz, 1883, 

 takes the cake for absurdities; published in Berichte D. 

 Chemische Gesellschaft. 



