Proceedings of the American Academy of Arts and Sciences. 



Vol. 58. No. 6.— February, 1923. 



(CONTRIBUTION FROM THE T. JEFFERSON COOLIDGE, JR. 

 CHEMICAL LABORATORY OF HARVARD UNIVERSITY.) 



A REVISION OF THE ATOMIC WEIGHT OF SILICON. 



THE ANALYSIS OF SILICON TETRACHLORIDE AND 



TETRABROMIDE. 



By Gregory P. Baxter, Philip F. Weatherill and 

 Edward W. Scripture, Jr. 



