[ 102 ] 
and by furnishing them with more than their natural 
quantity of it. Yet, ftrange as this may appear, the 
following experiments, I think, Shew plainly that it 
is the real cafe. 
Experiment V. 
In order to fee whether I could fufpend a calcareous 
earth in water, by furnilhing it with more than its 
natural proportion of fixed air, I took 30 ounces of 
rain water, and divided it into two parts : into one 
part I put as much fpiiit of fait, as would difiolve 
3 °tV grains of calcareous earth, and as much of a 
Saturated Solution ol chalk, in Spirit of fait, as con- 
tained 20 grains of calcaroeus earth : into the other 
part I put as much fixed alkali, as was eauivalent to 
46 -,V grains of calcareous earth, i. e. which would Sa- 
turate as much acid. This alkali was known to con- 
tain as much fixed air as 39 grains of calcareous earth. 
The whole was then mixed together and the bottle 
immediately flopped. The alkali was before Said to 
be equivalent to 46 _ 8 y grains of calcareous earth, and 
was, therefore, Sufficient to Saturate all the Spirit of 
fait, andalfo to decompound as much of the Solution 
of chalk as contains 164. grains of earth. This 
mixture, therefore, fuppofing I made no miflake in 
my calculation, contained 164. grains of unneutralized 
earth, with as much fixed air as is contained in 39 
grains of calcareous earth ; which is the quantity 
which was found to be in the fame quantity of Rath- 
bone place water. The mixture became turbid on 
firft mixing, but the earth was quickly re-diffiolved 
on fhaking, fo that the liquor became almoh trans- 
parent. After handing Some time, a flight Sedi- 
ment fell to the bottom, leaving the liquor perfectly 
trail (parent. 
