226 PROCEEDINGS OF THE AMERICAN ACADEMY 



Before going to the description of the phosjihorous anilid (CgIIjNH)2 

 PliO, we may add, that we tried to obtain the chlorine compound from 

 which it is formed by treating the fresiily heated orange mass with 

 benzol or with absolute ether, as these solvents seemed to offer the 

 best chance of success. The amount extracted in either case was 

 extremely small, and possessed the most unpromising properties, the 

 ether extract containing lumps of ordinary phosphorus imbedded in 

 a viscous mass, while the benzol extract resembled semiliquid paint, 

 and gave no evidence that it was a homogeneous compound ; it was 

 analyzed, however, and contained 5.12 per cent of chlorine and 21.27 

 per cent of phosphorus, wiiereas (C(;Il5NII).,PCl requires 14.17 per 

 cent of chloride and 12.37 of phosphorus. 



Phosphorous Anilid (C^H.Nff).^PHO. 



The preparation of this substance has been just described. In order 

 to purify it, as it did not crystallize, the crude precipitate was redis- 

 solved in a little alcohol, and precipitated with water; the viscous 

 mass thus obtained was kneaded thoroughly with water, dissolved 

 again in alcohol, and once more jorecipitated and washed with water; 

 it w, s then dried at about 5U°, and its composition determined by 

 the following analyses of a number of different preparations : — 



I. 0.3488 gr. of substance gave 0.7992 gr. of carbonic dioxide and 



0.1918 gr. of water. 

 II. 0.285G gr. gave 0.6502 gr. of carbonic dioxide and 0.1610 gr. 

 of water. 



III. 0.2190 gr. gave 0.5012 gr. of carbonic dioxide and 0.1180 gr. 



of water.* 



IV. 0.3402 gr. gave after treatment, according to Carius, 0.1590 gr. 



of magnesic pyrophosphate. 

 V. 0.201G gr. gave 0.0976 gr. of magnesic pyrophosphate. 

 VI. 0.4G23 gr. gave 49.9 c.c. of nitrogen at a temi^erature of 25° 

 and pressure of 766 m.m. 



* We found it best to carry on the combustions in a closed tube, the sub- 

 stance belli'.,' mixed- witli oxide of copper, as if burnt in a boat in oxytien 

 tli(> carbon was apt to come low, since tlie fused phosplioric acid prevented the 

 complete combustion of the substance. 



