56 Dr. J. Stenhouse on Chloropicrine. 



and nitre are deposited. When the oil is saturated with dry 

 ammoniacal gas or an alcoholic solution of ammonia, it is 

 converted into sal-ammoniac and nitrate of ammonia ; but 

 an aqueous solution of ammonia produces scarcely any effect 

 upon it. 



Chloropicrine boils at 120° C, and it may be heated as high 

 as 1.50° C. without being- decomposed. It is not inflammable. 

 When the oil is passed in vapour through a glass tube heated 

 to considerably under low redness, it is completely decomposed. 

 Much chlorine and deutoxide of nitrogen are evolved, and a 

 quantity of the solid perchloride of carbon C 4 CI 6 sublimes 

 into the colder portion of the tube. Several precautions must 

 be observed in subjecting chloropicrine to analysis. A very 

 long tube must be employed, the fore part of which must be 

 filled to the extent of seven or eight inches with a mixture of 

 reduced oxide of copper and copper turnings. The combus- 

 tion must also be conducted as slowly as possible, so that none 

 of the deutoxide of azote may escape decomposition. 



I. 0*2895 grm. oil gave 0*071 carbonic acid and 0*007 

 water = 0*26 per cent. H. 



II. 0*227 grm. oil gave 00565 CO 2 and 0*005 water =0'22 

 per cent. H. 



III. 0*2719 grm. oil gave 00670 CO 2 . 



IV. 0*2628 grm. oil gave 0*0608 CO 2 . 



I. 0*3746 grm. oil burnt with lime gave 0*9841 chloride of 

 silver = 0*2427 CI. 



II. 0*552 grm. oil gave 1*4515 Ag CI = 0*357 CI. 



III. 0*5707 grm. oil gave 1*5920 AgCl = 0*373 CI. 



IV. 0*468 grm. oil gave 1*2245 Ag CI — 0*302 CI. 



V. 0*3955 grm. oil gave 1*034 Ag CI = 0*255 CI. 



VI. Analysis of the oil by combustion with oxide of copper 

 and copper turnings yielded 350 volumes of gas, consisting of 

 116| volumes of nitrogen and 234 carbonic acid gas. This 

 determination is almost exactly one volume of nitrogen to two 

 volumes of carbonic acid, which is equivalent to 7*78 percent, 

 of nitrogen. 



Found numbers. 



V. 



65*34 



4758*37 100*00 100*00 100*00 100*00 100*00 

 These analyses agree pretty well with the formula 4C, 7C1, 

 2N, 10O. The small quantity of hydrogen is omitted, being 

 regarded as non-essential. The chloropicrine employed in 



