464 J. P. Cooke—Oxidation of Hydrochloric Acid Solutions 
Art. LXII.—The Oxidation of Hydrochloric Acid Solutions of 
Antimony in the Atmosphere ; by Josian P. Cooke. (Con- 
tributions from the Chemical Laboratory of Harvard College.) 
IN our original paper on the Atomic Weight of Antimony— 
Proceedings of the American Academy of Arts and Sciences, 
vol. xiii, page 21—we made the following incidental observa- 
tion in explanation of certain precautions which we found to be 
necessary in order to secure the precipitation of pure antimoni- 
ous sulphide: 
“The precautions here described may seem unnecessary to 
those who are not familiar with the fact that a solution of anti- 
based on quantitative measurements. What we noticed was 
of 
