



'I 





V 



i j 4 Vegetable Static hi 



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 f e . 

 veral roots of trees : The air paffed moft 

 freely from n to x -, and when the glafsvef. 

 idyy was full of water, and there was no 

 water in x, the water paffed at the rate of 

 3 ounces in 5 minutes 5 when the upper 

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

 fome 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- 

 ing for feveral days, yielded a little elaftick 

 air, tho* the earth was not half diffolved. 

 And in Experiment 68. we find that a cu- 

 bick inch of earth yielded 43 cubick in- 

 ches of air by diftiliation, a good part of 

 which was rou fed by the aftion of the fire 

 from a fix'd to an elaftick ftate. 



I fixed 



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