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Anahfis of the Air. 2 4 j 



but alfo thro' fcvcral parts of the body of 

 the vegetable above ground, which air was 

 feen to afcend in an claftick ftatc mod freely 

 and vifibly thro' the larger tra/.hea of the 

 Vine 5 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 ductile matter, out of which all the 

 parts of vegetables do grow. 



Experiment CXI. 



It is plain from thefe cfFecls of the fumes 

 of burning Brimftone, lighted Candle, and 

 the breath of Animals on the elallicity of 

 the air , that its elafticity in the veficles of 

 the lungs muft be continually decrcafing, 

 by reafon of the vapours it is there loaded 

 with ; fo that thofc veficles would in a lit- 

 tle time fubfide and fall flat , if they were 

 not frequently rcplenilhed with frefh elaf- 

 tick air at every inspiration, thro' which the 

 inferior heated vapour and air afcends, and 

 leaves room for the frclh air to defcend in- 

 to the veficles , where the heat of the lungs 

 make it expand about \ part ; which degree 



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