502 

 The formulae of these substances are 



E U ~! 



Chloride of Auro-phosphethylium . . j, )>P Cl. 



E j 



B^ 



Chloride of Auro-arsethylium . . . . j, )"As Cl. 



E j 



Au^| 

 Chloride of Auro-stibethylium ...... *j '^Sb Cl. 



E j 



The complementary products formed in these reactions remain in 

 the mother liquors of the several salts, from which they separate in 

 the form of oily compounds which gradually solidify into crystalline 

 masses. These I have not yet examined. 



A glance at the above formulae shows that the new compounds 

 which form the subject of this note correspond to the chloride of 

 platammonium, 



H 

 Hj 



It remains to be ascertained whether the chloride of plato-diam- 

 monium, 



H ^> N >N Cl, 



is likewise represented in the phosphorus-, arsenic-, and antimony- 

 series. 



VII. " On a New Series of Compounds derived from Ammonia 

 and its Analogues." By EDWARD ERANKLAND, Ph.D., 

 F.R.S. Received June 18, 1857. 



Although zincethyl and its homologues are now well known to be 

 capable of replacing electro-negative elements by ethyl, &c., yet it 

 could scarcely have been anticipated, that substitutions of an almost 

 opposite character would be effected by the same reagent ; neverthe- 



