CADY: A NEW EXPLOSIVE .COMPOUND. 73 
violent enough to shatter the beaker and then in some case to blow 
a hole through the crucible hd. 
Two determinations of iodin were made by decomposing the 
substance with sulfurous acid in the presence of very dilute sul- 
furic acid, acidulating with nitric acid and precipitating with 
silver nitrate. 
No. I. 0.0817 grams substance gave 0.1076 grams Agl. 
No. Il. 0.16185 grams substance gave o. 1568 Agl. 
NO ie sie Al eB Der, Cents 
Nov ii beey da. OS per cent. 
Calculated rm (NH §),[==71.26 per cent., CNER Sl =7o. cor per 
cent., (NH,),1,—74.85 per cent. 
An atte mpt was then made to determine the ammonia by decom- 
same way, then making the solution 
posing the compound in 
hydroxid and distilling into known 
alkaline with potassium 
volume of deci-normal sulfuric acid and liberating the excess of 
acid. 
No. Ill gave 3.17 per cent. NH. 
No. IV gave 3.26 per cent. NH. 
Calculated for Ee 25.15 per cent. 
bove, gas is always given off when this com- 
pound is dissolve re An effort was made to collect and measure 
this gas but failed chiefly on account of the numerous explosions. 
About seven out of eight of the samples blew up before they 
After trying a great many different meth- 
to determine the nitrogen 
As has been said ¢ 
could be decomposed. 
ods of decomposing the body in order 
it was finally exploded over mercury, 
and failing in all of them, 
The products of the 
ane the volume of the gas was measured. 
were N, NH,I and: fy the latter united with the mercury. 
platinum cup with a hol- 
reaction 
The substance was weighed out on a littl 
low stem welded onto the bottom. An iron wire was then inserted 
and the whole introduced into a eudiometer partly 
sure nitrogen to act as acushion. 
into the stem 
filled with a measured quantity of ] 
A few cc. of pure electrolytic gas was then run in and the whole 
exploded. The electrolytic gas in its explosion set off the iodin 
compound and the gain in volume over that of the pure nitrogen 
was of course that portion of the nitrogen in the compound which 
did not combine with the hydrogen and iodin to form ammonia 
iodid. 
0.0869 grams of the compound gave 15.3 CC. nitrogen at 0" 760 
m. m.==22.12 per cent. N exclusive of what remained behind as 
ammonium iodid. 
