Vegetable Stathks. ' 1 57 



perifhed ; yet the air ftill continued to flow 

 freely at x. 



It was obfervable in this, and many of 

 the Experiments on flicks of other trees, 

 that the air which could enter only thro' 

 the bark between z and n, did not iflue in- 

 to the water, at the bottom of the flick, 

 only at or near the bark, but thro* the 

 whole and inmoft fubflance of the wood ; 

 and that chiefly, as I guefs, by the largenefs 

 of the bafes of the hemifpheres of air thro* 

 the largeft veflels of the wood ; which ob- 

 fervation corroborates Dr. Grew's and Mal- 

 pighi\ opinion, that they are air-veffels. 



I then cemented upon the receiver the 

 cylindrical glafs y y y and filled it full of wa- 

 ter, fo as to fland an inch above the top n 

 of the flick. 



The air ftill continued to flow at x, but 

 in an hours time it very much abated, and 

 in two hours ceafed quite; there being 

 now no paffage for frefh air to enter, and 

 fupply what was drawn out of the flick. 



I then with a glafs crane drew off the 

 water out of the cylinder^ y; yet the air 

 did not iflue thro' the wood at x. 



I therefore took the receiver with the 

 ftick in it, and held it near the fire, till the 



bark 



