Analyfis of the Air. 24 j 
but alfo thro' fevcral parts of the body of 
the vegetable above ground, which air was 
fcen to afcend in an elaftick ftate mod freely 
and vifibly thro' the larger tracheae of the 
Vine ; and is thence doubtlefs carried with 
the fap into minuter veflels, where being 
intimately united with the fulphureous, fa- 
line and other particles, it forms the nutri- 
tive duftile matter, out of which all the 
parts of vegetables do grow. 
Experime NT CXI. 
It is plain from thefe effefts of the fumes 
of burning Brimjioney lighted Candle, and 
the breath of Animals on the elafticity of 
the air , that its elafticity in the veficles of 
the lungs muft be continually decreafing, 
by reafon of the vapours it is there loaded 
with ; lo that thofe veficles would in a lit- 
tle time fubfide and fall flat , if they were 
not frequently repleniflied with frefh elaf- 
tick air at every infpiration, thro’ which the 
inferior heated vapour and air afeends, and 
leaves room for the frefli air to defeend in- 
to the veficles , where the heat of the lungs 
make it expand about i part 5 which degree 
R 3 of 
