i6i Analyfis of the Am 
CHAP. VI. 
A fpecimen of an attempt to analyfe the Air 
by a great variety of chymio-Jlatical Ex- 
periments, which fhew in how great a 
proportion Air is wrought into the com- 
position of animal, vegetable, and mineral 
Subfiances, and withal how readily it re- 
fames its former elaftick fate, when in the 
dijfolution of thofe Subflances it is difin- 
gaged from them . 
H Aving in the preceding chapter pro- 
duced many Experiments, to prove 
that the Air is freely infpired by Vegetables, 
not only at their roots, but alfo thro* feve- 
ral parts of their trunks and branches, which 
Air was moft vifibly feen afcending in great 
plenty thro’ the fap of the Vine, in tubes 
which were affixed to them in the bleeding 
feafon 5 this put me upon makipg a more 
particular enquiry into the nature of a Fluid, 
which is fo abfolutely neceffary for the fup- 
port of the life and growth of Animals and 
Vegetables. 
The excellent Mr. Boyle made many Ex- 
periments on the Air, and among other dif- 
coveries, 
