OP ARTS AND SCIENCES. 225 



because our analyses given above show that the substance must con- 

 tain aniline chloride, and this would not have been removed by mere 

 solution in water, the only purification to which it was submitted by 

 Tait. We may add, that the solid matter apparently extracted by 

 ether was really dissolved in the excess of aniline, as it proved 

 insoluble in ether after the aniline was removed, and, as aniline 

 dissolves aniline chloride, we saw no prospect of purifying the phos- 

 phorus compound in this way. If, on the other hand, an excess of 

 phosphorous trichloride was used, the j^roduct was a white compact 

 mass, from which a considerable amount of solid matter was extracted 

 with ether ; but this was due evidently to its solubility in phosphorous 

 trichloride rather than in ether, and, as it contained only two per cent 

 of phosphorus, it was not thought worth while to pursue this part of 

 the subject further. 



Action of Heat on the Original Product. 



If the mixture, analyses of which were given above, is" heated, it 

 turns orange-red, and gives off aniline chloride, the purity of which 

 was determined by analysis, and a small quantity of a phosphorescent 

 gas, probably phosphoretted hydrogen. This change takes place 

 slowly and partially even at 100°, much more rapidly and completely 

 at 150°, or at even higher tempej-atures. We usually heated the mass 

 in a porcelain dish over a free flame, regulating the temperature so 

 that aniline chloride sublimed off freely, but no spontaneously inflam- 

 mable phosphoretted hydrogen was given off. The product when 

 heated with alcohol gave a colorless solution, and a residue of an 

 orange or red color, according to the length of time it had been 

 heated. As this residue was insoluble in all solvents, and could not 

 be purified completely ])y washing, we are in doubt as to its precise 

 nature; but, as one preparation contained as much as 81.73 per cent 

 of phosphorus, it cannot be an organic compoufid, but is either 

 amorphous phosphorus, or the red oxide or solid hydride of that ele- 

 ment. The alcoholic solution when treated with water gave a white 

 precipitate of (CgILNH)2PriO, while aniline chloride and phosphite 

 were left in solution with, so far as we could find, no other substances. 

 The formation of the red body is not essential to the production of 

 the mother-substance of (CgH5NH)2PHO, as we obtained, by short 

 heating in a dry test-tube, a yellowish waxy mass, which dissolved 

 completely in alcohol and yielded a lai'ge amount of (Cgll^NII)^?!!© 

 on addition of water ; upon longer heating, however, the yellowish 

 substance turned orange-red. 



VOL. XIX. (n. S. XI.) 15 



