308 J. W. Mallet—Barcenite from Huitzuco, Mexico. 
quantity. Hydrogen passed over the powder at a red heat 
“aapee reduces metallic antimony, which can then be attacked 
y acids. 
The quantitative analysis was made by Mr. J. R. Santos, of 
Guayaquil, Ecuador, using carefully selected specimens, free 
from visible impurity, and repeating several of the principal 
determinations. 
He obtained— 
Atomic ratios. 
PE oS: in na pak he 088 
UME RO ES iy ge Higa bone Pate | at 104 
MRI oe a ee 3°88 097 
IRN oc eee a5 50°11 418* 
Oxygen (by difference) ...-.---- 17°61 17101 
Sotistitaionnl —. = '3°50') .. 55... 3. "194 
Water “Ta 
lost below 130° C.+ 1-23 
SINCE Gu Se eer Ac 
Atomic ratios 
Pi ch whee, a Goes 
A a. die gets et ree pea oe ST 
A nce. xcs, Lanes Daw beyesed 418 
Re aiiniis se ci sacnae RIDA 
DR ay oii sies oo ak wien Sensi ewe 194 
corresponding to 
neo. 
Gey were ote =R'O 113: | ie 
BO so ete ck ---- 285 $=nearly< 1° 
SPO. os ict ae 180°5 
AE a ee 194° 6°8 
* Using the atomic weight 120 for antimony, the correctness of which has been 
rendered most probable by the recent Sidbaich of Professor J.P. Gecko —This 
agree pions ho 1878, p. 123. 
y any appreciable loss of water irre she ot course deter- 
mined directly) ooh this temperature or less up to more than 200° O. 
