1 54 Vegetable Statkhl 



thro* old bark : And in different kinds of 

 trees it has very different degrees of more 

 or Jefs free entrance. 



I repeated the fame Experiment upon fe- 

 veral roots of trees : The air paffed moft 

 freely from n to x 5 and when the glafs vef- 

 felyy was full of water, and there was no 

 water in x, the water paffed at the rate of 

 3 ounces in 5 minutes $ when the upper 

 end n was cemented up, and no water in y y % 

 feme air, tho* not in great plenty, would 

 enter the bark at zf, and pafs thro' the wa- 

 ter at x. 



And that there is fome air both in an 

 elaftick and unelaftick ftate, mix'd with the 

 earth, ( which may well enter the roots with 

 the nourifhment) I found by putting into 

 the inverted glafs z z a a full of water 

 (Fig. 35.). fome earth dug up in an alley in 

 the garden, which after it had flood foak- 

 iiig for feveral days, yielded a little elaftick 

 air, tho s the earth was not half diffolved. 

 And in Experiment 6%. we find that a cu- 

 bick inch of earth yielded 43 cubick in- 

 ches of air by diftillation, a good part of 

 which was roufed by the action of the fire 

 from a fix'd to an elaftick ftate. 



I fixed 



