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 Charles Robert Saxger and Otis Fisher Black. 



LIBRARY 

 NEW YORK 



"With Two Plates. OTANICAL 



GARDEN. 



