. 
a 
% 
| 
. folved again in diftilled water, compofes 
th 
§ 
PHYSICAL ano LITERARY. 225 
fhew that the cauftic alkali does not con- 
fain any lime. 
As it feems probable, from the quick- 
nefs and eafe wherewith the alkali was 
rendered cauftic, that more lime had been 
employed than what was juit fufficient to 
extract the whole of its air, we are fur- 
prifed to find that little or none of the 
fuperfluous quick-lime was diffolved by - 
the water.. But this phenomenon will be- 
come lefs furprizing, by comparing it 
with fome fimilar inftances in chemiftry. 
Water may be made to depofite a falt, by 
the admixture of a fubftance which it at- 
tracts more ftrongly than it does that falr; 
 fach as fpirit of wine; and quick-lime it- 
felf may be feparated from water upon the 
fame principle: For if that fpirit is added 
to an equal quantity of lime-water, the 
mixture becomes turbid and depofites a 
fediment, which, when feparated and dif- 
lime water. We may therefore refer the 
*! above phenomenon, with refpeé to the ley, 
to the fame canfe with thefe, and fay, that 
‘the water did not diffolve the lime, be- 
You. Il, Ff caufe 
