Proceedings of the American Academy of Arts and Sciences. 

 Vol. L. No. 8. — February, 1915. 



CONTRIBUTIONS FROM THE T. JEFFERSON COOLIDGE, JR., 

 CHEMICAL LABORATORY OF HARVARD COLLEGE. 



A REVISION OF THE ATOMIC WEIGHT OF PRASEODY- 

 MIUM. 



THE ANALYSIS OF PRASEODYMIUM CHLORIDE. 



By Gregory Paul Baxter and Olus Jesse Stewart. 



