of Cancer , and on Animal Hepatic Air . 409 
It is therefore manifeft, that, by the combuftion of the pure 
and inflammable air in the foregoing trial, fixed air was pro* 
duced ; the phlogifticated air, found in the refidue, being that 
which was contained in the pure air before the inflammation 
took place* * 
I next examined the products refulting from the comDuftion 
of pure air with that portion of the animai air which had not 
been previoufly agitated with water. One meafure of this 
fluid, at the expiration of three-fourths of an hour after ic had 
been obtained, was mixed over mercury with one meafure and 
an half of pure air, and fired by the electric fliock. The 
portion of the tube occupied by the mixture, previoufly to the 
deflagration, was one inch and To 5 -© 5 sfter the deflagration, it 
occupied the fpace of one inch and one-tenth. Being agitated 
with lime-water, very nearly one-third was abforbed. A por- 
tion of the infoluble refidue was expofed to a lighted taper, 
and burned with a faint blue flame *• f 
The dephlogifticated air ufed in this experiment had been 
previoufly agitated with water, to free it entirely fiom fixed 
air. It was the pure ft dephlogifticated air I had ever feen : for 
when one meafure of it was mixed with one meafure and 
nine-tenths of nitrous air, the refidue occupied the fpace 01 
only one-fortieth of a meafure. From the foregoing trial it was 
evident, that if parts of pure air were infufficient to faturate 
one of the animal air that had not been previoufly agitated with 
water. The experiment was therefore repeated as follows. I we 
* When I flrfl: made the above experiment, the refldue did not appear to be 
inflammable. It had been tried by applying an inflamed flip of paper to the 
mouth of a phial which was Ailed with it ; but, upon repeating the experiment, 
'when the phial containing the reflduary air was carried into a dark room, and an 
ignited wax taper was applied to its mouth, an evident inflammation took piace. 
Vol, LXXX. H h h .parts 
