5)0 Royal Academy of Sciences at Berlin. 



From k number of experiments which are ftated at length, 

 Mr. Chenevix imagines that the falls of the genus oxyge- 

 nized muriate do virtually exifl: ; but that, by fuperior af- 

 finities, they are all rcfolvcd~inlo nuuiates and hypcroxygc- 

 nized muriates at the Very moment the acid comes in con- 

 ta6l with the bafes. 



He defcribes and analyfes all the falts of the genus hj'pcr- 

 oxygenized muriate ; and mentions the hyperoxvgenizcd 

 muriate of ammonia as an extraordinary inftance of di- 

 fpcrlino" affinities. He obtained the alkaline faltS pure by re- 

 peated cryltallizations ; and the earthy falts, by boiling them 

 with phofphate of filver. 



He has exan:!ined likcwife feveral of the metallic falts of 

 this genus, and mentions hyperoxvgenized muriate of filvcr 

 as ftronglv marking the diflcrtnre between muriatic and hy- 

 peroxvgenized muriatic acids. He afcribes to this fait, when 

 mixed with any combuftible body, ah expanfive force, which 

 he thinks he will be within boimds if he fiatcs to exceed 

 tive times that of any known detonating fait. 



He concludes with an appeal to the chemical world, whe- 

 ther, in the prefent ftate of the fcience, it would not be more 

 philofophical to fav. 



Muriatic radical, or fomc one"! f 



word of the fame import. 



Muriatic acid; 



Ml { ■ r. i c 1 Oxvsrcmzed 



unatous acid, >uittead or< - •- ■ -i 



' f j muriatic acid ; 



•sr • ^- •? 5 ! HvPcroxvQfcnizecl 



JViunatic acid, • | '•.•'"• i 



' J ^muriatic acid; 



and dates the arguments in f^xvour of each appellation. 



As a warning; to thofe who would repeat his experiments, 

 he relates, in the courfe of his paper, an accident that hap- 

 pened in his laboratory, to himfelf, and to Mr. Vandeer, by 

 which the latter gentleman had almoft loft his iight, and was 

 wounded in the moft dreadful manner. 



On the 4th and Tith of February, letters from Dr. Mafkc- 

 lyne, Mr. Von Zach, ^-.Icx. Aubert, Efq. and Mr. Gilnin, 

 clerk to the Royal Society, were read, ftating that they had 

 obferved the new planet. As wc have already given its ob- 

 ferved places, Hec p. 54, &cc.) we need not here repeat 

 I hem. 



On the 18th of Febmary, a paper by Dr. Herfchel on the 

 fame fubjedl was read. His refults are given in the preceding 

 pages. 



ROYAI. ACADEMY OF SCIENCES, BERLIN. 



The laft fitting of the Royal Academy of Sciences was oc- 

 cupied 



