jJ24 COMBINATIONS or OXIMUItliTte 6At ANB ^XXCSfEN. 



jttttriatesof thu5 afford easy means of procuring calcium. The rapidity 



the eatths. ^j^j, which muriate of lime absorbs water, and the diffi- 

 culty of freeing it even by a white heat from the laat por- 

 tions, rendered the circurastao/:es of the experiments unfa- 

 vourable. I found, however, that by heating potassium 

 strongly, in contact with the salt* in'a retort of difficuUly 

 fusible glass, I obtained a dark coloured matter, diffused 

 through -A vitreous mass, which effervesced strongly with 

 water. The potassinm had all disappeared, and the retort 

 had - received a heat at which potassium entirely volati- 

 lizes. 1 had similar results with muriate of strontia, and 

 (though less distinct, more potassium distilling off unaltered) 



V with muriate of baryta. Either the bases pf the earths were 



wholly or partially deprived of ojcj muriatic gas in .these 



processess, or the potassium had entered into triple combina- 



tjtion with the muriates. I hope on a, future occasion to be 



able to decide this point. • ,^ 



Combination Combinations pf muriatic acid gas witii magnesia,, a^lui* 



oj magnesia, mine, and ailex, are all decomposed by heat, the acid being 

 adumtne, and ' \ , V • ■ r \ » 



sa«x, with anven otr, and the earth remaining free. 1 conjectured 



muHatic gas. from this circumstance, that oxirauriatic gas would not expel 

 oxigen.irpm t|ie<ie eapths,vand the *uspidon %tft«,ftdhfiMned* 

 by experiments. I heated inagnesia*, alumine, and silex to 

 redness in oxi muriatic gas, but no change'tbok p;ace. ' 

 Bzrjtes ih» Messrs. Gay- Luss^c an4 Theqard have shown, that baryta^ 



sorbs oxigcn. |g capable of absorbing oxigen ; and it seems Ukety, (as, ac- 

 cording to Mr. Chenevix's experiments, most of the earths 

 are capable of becoming^ hyperoximuriates) that peroxides 

 of their bases must exist. ■ .'^*-. 

 Lii!»enpp9» ' endeavoured to combine lime -with more oxigen, by 



rcQtly not. Ideating it in hyperoximuriate of pHtash, but without success, 

 at least after this process it^ave off no oxigen in combining 

 Oxiauriate. withvwater. cl^e salt, call^ed'oximufiate of lime, made for 

 tho use of the bleachers, I found gate off oxlgdrby heat, 

 and formed muriate of lime. "^ 



S'f ^'^°' * ^'*^'" ^^^^ experiments 6f Messrs Gay-Ti)ussac ahdThenard, BuU 



oximnriatic ^®^' <J^'a^oci^^- P^il. Mai, 1810, it appears, tha oxigf-'n 'S focured by 

 gas and mag* passing oxiinuriatic gas over magnesia at a high temperature, and that a 

 nesia. muriate indeci^mposable by heat is produ^-vl,' They attribute the pre- 



sence of thisoXigpii to e decqmposit n o the aci '; b t, according to 

 . all analogies, it must arise fiom the decomposition of the earth. 



From 



