138 On definite Proportions. 
depend. I therefore consider the experiment on the preci- 
pitation as the most to be depended on, and acc6rding to 
this the muriate of lime consists of 
Muniatic acid ,,.... 48°] 100°0 
PEAGTEEe ieeotetatis 5159 107°9 
If we examine this result by calculation according to the 
quantity of baryta and lime, by which i00 parts of sul- 
phuric acid are saturated, and the quantity of baryta re- 
quired to neutralise 100 parts of muriatic acid, we have 
194 : 72°41=288°6: 107°72. Here then the calculation 
pretty nearly agrees with the experiment. 
If now in these 107°9 parts of lime 30°49 of oxygen are 
contamed, lime must contain 28°267 per cent. of oxygen: 
This being supposed correct, we have for lime 
AICI. ge.e'« dpb Tas 100°0 
OXVPEN win she ise, BERBH7. 39°4 
XIX. Baryta. Muniatic Actp. 
The foregoing experiments agreeing pretty well with the 
results of calculation, I believe that I may take for granted 
that hereafter calculations alone will be sufficient, when 
they are founded on the results of correct experiments. 
Thus, for example, in the case of baryta, the composition 
of which may be pretty easily calculated ; since 100 parts 
of sulphuric acid suppose in 194 of baryta 20:29 of oxy- 
gen, baryta must consist of 10°46 oxygen and 89:54 bary- 
lium ; or sitice 100 parts of muriatic acid suppose in 288°4 
of baryta 30°49 of oxygen, baryta must consist of 10°575 
oxygen and §9°435 barytium. The difference of these two 
results shows that the analyses are not yet arrived at a suf- 
ficient degree of perfection, but it may be boped that in 
future this perfection will be more easily obtained. In the 
great number of analytical experiments which I. have been 
obliged to employ, in order to obtain some connected re- 
sults, no man will be surprised if I have not always suc 
ceeded in determining every figure of the numbers con- 
cerned with perfect accuracy. 
May we not expect that the same proportions, which we 
have found to prevail in whole orders of compounds, must 
always subsist between the same substances, even in com- 
plicated mixtures, and in bodies of different natures? J] 
conjecture that this question, after many repetitions of ex- 
periments, will he answered in the athrmative, although 
there may be some partial exceptions; as we have already 
secn in the analyses of the subsulphate and the sulphate of 
the oxide of iron, where the original. proportions of the 
: sulphur 
