Analyfis of the Air. 24 j 



but alfo thro' feveral parts of the body of 

 the vegetable above ground, which air was 

 feen to afcend in an elaftick ftate moil: freely 

 and vifibly thro* the larger trachea of the 

 Vine 5 and is thence doubtlefs carried with 

 the fap into minuter velTels, 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. 



Experiment CXL 



It is plain from thefe effeds of the fumes 

 of burning Brimftone^ 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 decreasing, 

 by reafon of the vapours it is there loaded 

 with 5 (o that thofe veficles would in a lit- 

 tle time fubfide and fall flat , if they were 

 not frequently replenifhed with frefh elaf- 

 tick air at every infpiration, thro s which the 

 inferior heated vapour and air afcends, and 

 leaves room for the frefh air to defcend in- 

 to the veficles , where the heat of the lungs 

 make it expand about i part 5 which degree 

 R 3 of 



