{ xviii j 
the lungs is infected by fixed airy 
which being immediately abforbed 
by the contact with lime-water, the 
dephlogifticated air is reftored very ~ 
near to its former purity. Inftead 
of the bended tube juft mentioned, 
the top of the receiver may be made 
, as the neck of a bottle, and a tube 
-may be fixed to it, having a ¢ock to 
_ open and fhut the paffage as re- 
We confume, by each infpiration, 
about 30 cubic-inches of air; and 
ase ee rs se {piano for a 
ogy: white 
450 Subiceaes of ai The Abbé 
Fontana found, that the dephlogifti- 
cated air being, after each refpira- 
tion, purified again by the lime- 
water, will remain good about thirty 
times as long as it would when 
‘breathed in the ordinary way; and 
7 ; that 
