J. P. Cooke—Atomie Weight of Antimony. 121 
tinum nacelle, and heated, as has been described, in a current 
of dry carbonic dioxide gas. No sublimate was formed, and 
only a very slight empyreumatic odor could be perceived. 
Weight of platinum nacelle ---..2.. 2. 21.22. 6-2493 grams. 
= nacelle and dried precipitate -- ------- 95273 “ 
- portion taken. (2c 2. 2c ci jee! _.8°2780  * 
nacelle and precipitate after heating to 
285° for over half an hour --..-.-.9°5234 “ 
Loss of weight of portion taken-...------.-----0°0039 “ 
Corresponding loss for whole precipitate ---. ---. 00041 “ 
Weight of red sulphide as above----- .--------- 3°4196 * 
Fs gray sulphide. :.. 60. - 43 -5s2 sen $4155 
The carbonaceous residue left on dissolving this whole 
amount of gray sulphide in hydrochloric acid was barely per- 
ceptible. It was collected, however, as usual, on a weighed 
paper disk, and estimated. 
Weight of small paper filter......-.---.--- ----0°0198 grams. 
* Bamé with Tresidte 2 2022 45 220 ce 02127 % 
5 tesidueorustiieo hides seer ES ae 00014 
Calculated for whole precipitate... .-------- ---- 0°0015 : 
Weight of gray sulphide as above...----------- 3°4155 
Total weight of gray sulphide. --- 34140 “ 
Corresponding weight of antimony ditsaad to be 
¥ of the sulphide. _.-_..----- -- -- EE ol er 
Per cent of antimony in the antimonious chloride 
ion .. orate 
. 
under examinatio 
tion, the lower is the more exact. nti 
oming next to the chlorine determinations, we noticed, for 
rocess, as employed in the analysis of chloride of antimony. 
a precipitate of argentic chloride that had been deposited 
