466 3S. P. Cooke—Uzidation of Hydrochloric Acid, etc. 
Weight of Sb originally dissolved ._...--.---- 1°4136 
1. Dissolved from balls after 3 days’ exposure, -0°0150 
2. do. tifter 5. dayey.. pce ss ews eau ios ORG 
3. do. “ 10 “ May 17 to May 27,...0°0600 
4 do. “ 23 “ May 27 to June 19, _..0°1340 
5 do. “ 37 “ Junel9 to July 26, ._.0°2960 
6 do. “120 “ July 26 to Dec. 24, ...0°4481 0°9826 
During these experiments the volume of the solution was 
gradually increased by the hydrochloric acid used in washing 
as above described, so that at last the volume amounted to 100 
cubic centimeters. . 
t will be noticed that the amount of oxidation increased 
with the time of exposure, and that so long as the amount was 
small it was as nearly proportional to the time as could be 
expected under the varying conditions. The increased activ- 
slowly as we should naturally expect, but, with the greatly 
varying conditions during this long period, no certain conclu- 
sion can be drawn in regard to the effect of any single cause. 
The action we are discussing is entirely in harmony with the 
chemical relations of antimony. The most striking character- 
istic of this elementary substance is its tendency to form com- 
pounds of the radical antimonyl, SbO. The oxichlorides, the 
oxibromides and the oxi-iodides whose relations we have dls- 
S papers, are examples in pont, 
and we have been continually surprised by the appearance of 
‘ni pure 
metallic antimony with 50 cubic centimeters of strong and 
pure hydrochloric acid, to which we added only one cubic cen: 
timeter of the very dilute nitric acid (5°4 per cent) described 
above. The flask was placed in a warm protected place (30 
C.) and shaken from time to time. Soon the acid became col- 
