BAXTER. — ATOMIC WEIGHT OF PHOSPHORUS. 605 



phosphorus becomes 31.024. These values agree very closely with 

 those found by the analysis of silver phosphate by Baxter and Jones. 



An attempt to prepare and analyze phosphorus trichloride in a simi- 

 lar manner is now under way in this laboratory. 



We are particularly indebted to the Carnegie Institution of Washing- 

 ton for generous pecuniary assistance in carrying out this investigation. 



Cambridge, Mass. 

 December 1, 1911. 



