414 Experiments on the Combinations of 
compesed by oxymuriatic gas than quicklime, its oxygen 
being rapidly expelled with the water. J 
Some dry quicklime was heated. ina retort, filled with 
muriatic acid gas; water was instantly formed in great abun- 
dance, and it can hardly be doubted, that. this arose frony 
the hydrogen of the acid combining with the oxygen of the 
hme. i119 
As potassium so readily decomposes: common salt, I 
‘thought it might possibly decompose muriate of lime, and 
thus afford easy means of procuring calcium... The rapidity 
;with which muriate of lime,absorbs water, and the difficulty 
of freeing it even by a white heat from,-the -last;/portions, 
rendered the circumstances of the experiments unfavoura- 
‘ble. 1 found, however, that by heating potassiimistrongly, 
“am contact with the)salt, inja retort of dificultly fusible lass, 
_Jobtained a dark-coloured matter, diffused througha vitreous 
‘mass, which, effervyesced | strongly wath ;waters, Lherpotas- 
sium had jal] disappeared, and the revert had) receivetha heat 
at which potassium entirely volatilizes. [had similar-ree 
‘sults with muriate of strontia, and (though less distinct, 
more potassium ‘distilling of unaltered) with muriate of 
‘baryta. Either the bases ‘of the'eatth Were wholly or par- 
tially deprived of oxymuriatie gas inithese processes; or the 
potassium, had, entered, into. triple, combination -with the 
-muriates,, I hope. gn-a futare,oecasiom to beable tumecide 
this points .3 | selsisma diiw e6e oiisimueayxo: to 2n 
Combinations of muriatic acid.gas with magnesia, alumine 
and silex. are all.decomposed, by; heat, the! acidibeingariven: 
off, and the earth remaining frees»: f; conjectured: from this: 
circumstance, that oxyanuriatic igas;would notexpeloxygen 
from these carths,.and) the SUSPILiO was) can fimedibyex-- 
periments. ,] heated magnesia, alurmings and: silex to red- 
ness in Oxy Muylatic, gas, but ne,change took: places .» 
MM..Gay Lussac and Thenard have shown that baryta 
is capable, of, absorbing, oxygen; :anid siti seems likely, (as 
according 10 Mr, Cheneyix’s experiments, most of the earths 
are capable of becoming hyper-oxymuniates) thav peroxides 
of their bases. must,exigtee)) i640 5 div 
J endeavoured, to. combine lime with» more! oxygen, by 
heating it an hyper _oxymuriate.of potashy but without suc- 
cess 5 atleast alter this process it gave aff'no oxygen mm com- 
bining with water. The salt called oxymuriate of lime, 
made for the use of the bleachers, T found gave off oxygen 
bv heat, and formed muriate of lime. 
Kom the proportions which I have given in the last 
Bakerian 
Se ee 
