F sivu. > 
abforbed by fhaking it in.common 
water, “but infinitely more: readily 
by. the contact. with. . RPS 
Wately ins 
; Hefills one ae the large: receivers % 
of. al.,ai ir-pump, ° , which are pes 
wide. at; their upper extremity, half 
full of dephlogifticated air extracted 
from nitre, fo that it-may contain 
about 500 cubic-inches of this. air, 
- which will ferve for breathing. dur- 
ing half an hour. The manner of 
setae chs ain cot a soe neat iver, 
ther by thrufting a ber 
Fi 33 aneertne receiver (rien this 
is floating in water, in which it is 
f pportes by its peculiar bulky form), 
xeaching into the air itfelf,. and 
weeping aad rosie extremity in, . the 
oe 
ae oe “breathing. it. out chy the 
dame tube. This air returning fror 
