84 Vegetable Statkks. 



Mercury bfing 13 + f times fpecifically 

 heavier than water, it may eafily be eftima- 

 ted to what height the feveral branches in 

 thefe experiments would raife water ; for if 

 any branch can raife mercury 12 inches, it 

 will raife water 13 feet -}- 8 inches: A 

 further allowance being alfo made for the 

 perpendicular height of the water in the 

 tubes, between r and z the top of the co- 

 lum of mercury, for that column of water is 

 above lifted up by the mercury, be it more 

 or Iefs. 



At the fame time, I tryed a Golden Re- 

 nate branch 6 feet long, the mercury rofe 

 but 4 inches, it rifing higher or lower in 

 branches nearly of the fame fize and of the 

 fame kind of tree, according as the air if- 

 fued thro' the ftem, more or lefs freely. 

 In the preceding experiment on the Non- 

 pareil branch, I had fucked a little with my 

 mouth at the fmali end of the tube, to get 

 fome air bubbles out of it, before I im- 

 merfed it in the mercury ; ( but thefe air 

 bubbles are bed got out by a fmali wire 

 run to and fro in the tube ) and this flic* 

 tion made air bubbles arife out of the tranf- 

 verie cut of the branch j but tho' the quan- 

 1 tity 



