Ammonium Amidosulphite. 



By 

 Edward Divers :^nd Masataka Ogawa, 



Imperial University, Tokyo. 



The interaction of sucli familiar gases as ammonia and 

 sulphur dioxide ceased to attract with any effect the attention of 

 investigators sixty years ago and more. Yet comparatively 

 nothing had then been definitely made out about the nature of 

 the product, and even the few statements concerning it in some 

 of the best treatises on chemistry have but little experimental 

 foundation. The history of t]\e subject is briefly given on p. 193. 



Non-union of dry sulphur dioxide and ammonia. 



Even when comparatively well-dried, sulphur dioxide and 

 ammonia unite at once and with great energy when brought 

 together ; yet they can remain mixed without combining, pro- 

 vided suflicient care has been observed to exclude moisture. It 

 has not been necessary, however, in order to demonstrate this 

 striking phenomenon, to have resort to the elaborate precautions 



