15.6 Mr. Kinwan’s Remarks on 
water, a few drops of that water let into lime-water will pro- 
duce acloud. Mr. Fonrana fays, he frequently agitated 1 cubie 
inch of Tinéture of Turnfole in 7 ot 800 of common air, with- 
out reddening it (23 Roz. p. 188.); and yet, according to Mr. 
Bzercoman, 1 cubic inch of fixed air is fufficient to redden 50 
of Tincture of Turnfole (1Berem. 11.); from whence lam apt 
to think, that 700 cubic inches of common air do not even 
contain 2th of a cubic inch of fixed air. Dr. Wuyrr found 
that 12 ounces of {trong lime-water, being expofed to the open 
air for rg days, ftill retammed about 1 grain of lime, (on Lime- 
water, p. 32.). Now 12 ounces of {trong lime-water contain 
at moft 9,5 grains of lime, and 1 grain of lime requires only 
0,56 of a cabic inch of fixed air to precipitate it, the thermo- 
meter at 55 and the barometer at 29,5, as I have found. There= 
fore in 1g. days this lime-water did not come in contact with 
more than four cubic inches of fixed air; yet it is certain that 
a large quantity of fixed air is continually difengaged, and 
thrown into the atmofphere, by various proceflés, as putre- 
faction, combuftion, &c. but it feems equally certain that it is 
either decompofed, or more probably abforbed by various bodies. 
Mr. Fontana let loofe 20000 cubic inches of fixed air, in a 
room whofe windows and doors were clofed, yet in half an 
hour after he could not difcover the leaft trace of it (ibid.). 
Though fixed air perpetually oozes from the floor of the Grotto 
del Cane, yet at the diftance of four or five feet from the ground 
none is found; animals may live, lights burn, &c. (Roz. Ibid. Mem. 
Stockh. 1775.). If diftilled water be expofed to the atmofphere, 
it.is never found to abforb fixed air, but rather dephlogifticated 
air, according to Mr. ScHEELE’s experiments, which could never 
happen if the atmofphere contained any fenfible proportion of 
hs iu 7 Pies | tieate ior fixed 
