Scientific Intelligence. — Chemistry. 155 



may be stirred and washed thoroughly under water without fear of 

 detonation. The pressure even of a tube, which in the common 

 way so easily causes detonation, is in this case, safe. 



Iodine precipitated from its alcoholic solution by water, placed in 

 contact with liquid ammonia, gives an ioduret, which, like that made 

 with iodine in powder detonates under water with the slightest fric- 

 tion. 



It is said that no gas is disengaged in the preparation of the ioduret 

 of azote ; but the contrary will be evident by mixing, either the alco- 

 holic solution, or iodine in powder with liquid ammonia, in a tube 

 closed at one end and inverted in a capsule of water. Bubbles of 

 gas extremely fine immediately arise and increase in the upper part 

 of the tube. — Idem. 



21. Chloride of nitrogen. — The method of M. SeruUas of pre- 

 paring this dangerous compound, does not differ from that usually 

 prescribed. Nevertheless, he states, that notable differences have 

 been observed in the products which it gives when in contact with wa- 

 ter only, or, at the same time with bodies which have no action on that 

 fluid. The substance having been prepared with chlorine and a so- 

 lution of one part hydrochlorate of ammonia, in eighteen of water, 

 was well washed with pure water, and being exposed under water it 

 disappeared in twenty four hours. 



Caustic potash disengaged azote and formed nitrate and hydroclo- 

 rate of potash. 



Sulphuret of carion mingled with it, slowly disengages azote, 

 forming hydrocloric and sulphuric acid and ammonia. 



Selenium produces an explosion as violent as phosphorus. 



Arsenic in j)owder detonates as violently with great light. 



Oxide of arsenic produces a quiet decomposition. 



JVitrate of silver acts promtly but quietly. 



Oxide of silver — and the oxides of copper, cobalt and lead produce 

 decomposition with disengagement of azote. — Idem. 



■ 22. The fulminating silver &rst ohtmned hy BenhoHet hy hrmo^n^ 

 into contact oxide of silver and ammonia, has been regarded by some 

 chemists as an ammoniuret of the oxide and by others as an azoturet 

 of metallic silver. 



The analogy between this compound and the chloride and iodide of 

 nitrogen leaves but little doubt of its being a compound of nitrogen 



