— = 2 ane We air and- put it 
; 9re 4 : 
one of nitrous air 1.773 and that 
of, the >y wolcyaa tins’ I. § 3, 
Kas. I Placed a very lively chicken, 
eight days old, under a jar contain- 
ing a quart full of the air fouled by 
the Ayo/cyamus plant in the precede 
ing experiment; it directly grew 
fick, and was ready to expire in. lefs 
than half a minute. 1 took it im- 
mediately out of the jar, and: put 
it directly in another jar full of de- 
phiogifticated air drawn from the 
leaves of plants. The creature re- 
mained for fome minutes. quite mor _ 
tionlefs, thewing no figns of life 
_ but by drawing languidly its breath; 
it recovered gradually i in. this air in 
fix or feven minutes fo much that 
it began to ftand upon its legs. and 
to jelp now and then with a very 
weak voice. I then took it out of - 
upon : 
