(422 Mr, Cavenvisn’s Experiments on Airs 
ed experiments, thatif the lime water was clean, and the the: 
airs were previoufly wathed with that fubftance, not the: leaft 
cloud) was produced, either immediately on mixing them,.or 
on fuffering them to. ftand- upwards of an hour, though i It .ap= 
eared. by. ihe thick clouds which’ ‘were produced in the ‘lime 
water, by breathing: through it after the experiment was finifh= 
ed, that it was more than fufficient'to faturate:the acid formed 
by the:decom:pofitien; of, the nitrous air, and confequently that 
if, any,, fixed air; had been produced,: it muft have become: vifi~ 
ble.,.,Once indeed I found a {mall cloud to be formed on the 
furface, after the mixture had ftood,a few minutes. ; In this ex- 
periment the lime water was not quite clean’; but’ whether the 
cloud was owing to this, circumftance, or to the air’s haa not 
been properly wafhed, I cannot pretend to fay.) i) - | 9 
Neither does any fixed air feem to be produced by the ae 
fion of the inflammable air obtained from’ metals, with either 
common or dephlogifticated air. , This I tried by putting alittle. 
lime- water into-a glafs globe fitted, with a brafs cock,i fo.as to 
make it air tight, and/an apparatus for firing air by eleétricity.: 
This. globe was exhaufted by an; air-pump, and the twoiairs, 
which had been previoufly wafhed with lime-water, let:in, and: 
fuffered to remain fome time, to fhew whether they, would 
affect the lime-water, and then fired by electricity. The event 
was, that not the leaft cloud was produced in the lime-water, 
when the inflammable air was mixed with common air, and 
air contained in it by means of water. On fhaking a mixture of ten parts of com- 
mon air, and one of fixed air, with more than an equal bulk of diftilled water, 
not more than half of the fixed air was abforbed, and on transferring the air into 
freth diftilled water only half the remainder was abforbed, as appeared by the di- 
minution which it fill fuffered on adding lime water. 
only 
