‘On definite Proportions. 137 
bonate of lime was obtained. So that 56-4 parts of lime 
' being Pnrained in 100 of the carbonate; the 345 gr. cor- 
respond to ‘0818 of pure lime, which, according to this 
experiment, must consist of 73} per cent. of the base aud 
264 of oxygen. 
2.) An amalgam of 53°535 gr. gave off -037 of calcium 
to the water, and from this water I obtamed with the car- 
bonate of ammonia ‘09 of carbonate of lime. This gives 
*for lime 73 parts of the base and 27 of oxygen. 
3.) An amalgam of 56°65 gr. which, im order to expel 
all possible moisture, had been heated in an air-tight vessel, 
‘and then’ hastily passed through a capillary funnel, far- 
-nished to the water ‘0435 of calcium. The lime water was 
saturated with sulphuric acid, and evaporated and ignited 
in a golden crucible. _ It afforded - 148 of gypsum, in which 
-0622 of lime is contained. According te this experiment, 
lime consists of 70 parts of base and 30 of oxygen. 
Calculations conducted on the same principle with those 
by which the composition of the alkalis has been deter- 
mined, give for that of lime a result not materially al va- 
riance with these experiments. We have seen, in treating 
of the sulphuric acid, IIT. A.) that dry gypsum is com- 
posed of about 58 parts of sulphuric acid and 42 of lime, 
or that 100 parts of sulphuric ‘acid saturate 72°41 of lime. 
- If these now contain 20°89 parts of oxygen, they give for 
- 100 parts of lime 28 of oxygen. 
In order to calculate the composition of lime from its com- 
bination with the muriatic acid, [analysed the munaate of amen 
a) Ten grammes of carbonate of lime were dissolved ii 
muriatic acid in a glass flask, then dried and ignited antl 
they were fused. The fused salt weighed 10°96 gr. Bue 
ten gr. of carbonate of lime contain 5°62 of hme; conse- 
quently 100 parts of fused muriate of lime consist of 48°54 
of acid and 51°46 of lime. 
b.) Some muriate of lime, which had been fused ina 
- platina crucible, and weighed 3°01 gr., was dissolved in 
water, The solution was not perfectly clear, but was ren- 
dered so by a single small drop of very weak nitric acid. 
The precipitate by nitrate of silver weighed 7°75 gr. wheia 
fused. This answers to 1°448 gr. of muriatic acid, whence 
- the muriate contains 48-1 of acid and 51°9 of lime. 
This agrees pretty well with what has been already re- 
lated; for we know, from the experiments described in the 
analysis of sal ammoniac, with what force the muriate of 
lime retains its water, and on this the greater proportion of 
muriatic acid found in the former experiments may possibly 
depend. 
