AMIDOSULPHOXIC ACID. 235 



phenylamidosùlphqnate (Paal and Kretschmer, 1894). Both reactions 

 are analogous to the hydration of the acid, NH and functioning 

 alike. 



Its behaviour when heated dry will be found described after the 

 account given of its salts. 



Preparation and properties of the salts. 



A number of the salts of amidosulphonic acid were examined by 

 Berglund, and a comparatively full account of his work upon them, 

 condensed by Clève from Berglund', s Swedish memoir, was published 

 in the Bulletin, 29 422. The salts examined were those of potas 

 sium, sodium, lithium, ammonium, thallium, silver, barium, strontium, 

 calcium, lead, nickel, cobalt, manganese, zinc, cadmium, and cupricum, 

 and the existence of a basic mercuric salt was pointed out. Raschig 

 prepared again and analysed the potassium salt, and included, in his ac- 

 count of it, its crystallographic elements, as determined by Fock. 

 Krafft and Bourgeois again analysed and described the barium salt ; 

 Eitner again analysed the barium and the silver salts. Paal and 

 Kretschmer again analysed and described the silver salt (acknowledg- 

 ing the previous work of Eitner), the copper salt, and the lead salt. 

 Of these investigators, Raschig alone mentions Berglund, carefully 

 indicating the «Teat value of his work. The others are silent as to the 

 work of the chemist who not only first prepared the acid and its salts, 

 but analysed and described them, at least as fully as they have done. 

 Yet an epitome of Berglund's paper, drawn up by himself, appeared in 

 the Berichte of the German Society (and not among the Be/crate), 

 besides appearing, in another form, in the Bulletin of the French Socie- 

 ty, as we have just said. 



Xow that the isolation of the acid has become easier than that of 

 any of its salts, the work of Berglund and of Raschig, upon the prépara- 



