et eee 
J. P. Cooke---Atomic Weight of Antimony. 47 
e, The same as d, again distilled below 100° in a current of dry hydrogen gas. 
f Was made with a crystallized chloride from Merck of Dermoid purified by 
ulphide of car- 
g, Same as f, but in this determination the antimony was first precipitated from 
the solution 
ANALYsis OF ANTIMONIOUS CHLORIDE. 
DETERMINATION OF CHLORINE. 
% of Chlorin 
SbCl, AgCl. C1=35'5 At. Wt. of Sb 
No. grams. grams. g=108. =35 
LG 1°5974 yielded 3°0124 46°653 121°78 
2a 1°2533 = 2°3620 46°623 121°93 
3 a. 0°8876 v2 1°6754 46°696 121°57 
4b, 0°9336 is 15674 46°516 122°46 
5 6. 0°5326 #: 1°0021 46°446 122°30 
6 0°7270 34 1°3691 46°588 122-10 
TSG 1°2679 se 2°3883 46°599 122°04 
8 « 1°9422 oa 3°6646 46°678 121°66 
9e 1°7702 Ke 3°3384 46°655 121°77 
10d. 2°5030 oe 4°7184 46°635 121°87 
11 d. 2°1450 ng 4°0410 . 46°616 121°96 
12 e 1°7697 . 3°3281 46°524 122°42 
13 @. 2°3435 3 4°4157 46°613 121°98 
14 f. 1°3686 ss 2°5813 46°659 121°75 
157. 18638“ 3°5146 46°650 121°79 
16 f. 2°0300 e 3°8282 46°653 121°78 
17 g. 2°4450 “ 4°6086 46°630 121°89 
Mean value for all analyses 46°620 121°94 
Theory when Sb = 122 46608 122° 
: “g: == 120 47-020 120° 
If in calculating the per cent of chlorine from the results of 
the above determinations we use the atomic weights for silver 
and ehladne obtained by Stas (namely, Cl=35°457 and Ag= 
107-93), these per cents will be in each case very nearly 0-020 
lower, and we shall obtain for the mean value 46°600 instead 
of 46-620. pons on this assumption the atomic weight of 
antimony, deduc m Dumas’s cag of the chloride, would 
be 121-95 foatead of 199 Again, if we use Stas’s value of the 
atomic weight of sul has (S=32-074) in pA ee tlfe atomic 
weight of antimony rom ourown results, on the synthesis of the 
sulphide, we should para 120-28 instead of 120; and, lastly, the 
values Sb=120-28 Cl=85'457 give for the per cent of 
ehlorine i . antimonious chloride the value 46-931. 
ere, then, is a most striking result: for these determina- 
tions Nitin the value of the atomic weight of pulicoat 
