Proceedings of the American Academy of Arts and Sciences. 

 Vol. XLIII. No. S. — October, 1907. 



CONTRIBUTIONS FROM THE CHEMICAL LABORATORY 

 OF HARVARD COLLEGE. 



THE QUANTITATIVE DETERMINATION OF ARSENIC 

 BY THE GUTZEIT METHOD. 



By Chaeles Eobekt Sangee and Otis Fishee Black. 



With Tvto Plates. 



