Vegetable Statkks. 



141 



ing only a few fmall ones to draw up the 



^The inftance of the Ilex grafted upon the 

 Englijh Oak, feems to afford a very con- 

 siderable argument againfta circulation. For 

 if there were a free uniform circulation of 

 the fap thro' the Oak and Ilex, why mould 

 the leaves of the Oak fall in winter, and not 



thofe of the Hex > 



Another argument, againft a uniform cir- 

 culation of the fap in trees as in animals, 

 may be drawn from Exper. 37. where it 

 was found by the three mercurial gages fixt 

 to the fame Vine, that while fome of its 

 branches changed their ftate of protruding 

 fap into a ftate of imbibing , others con- 

 tinued protruding fap, one nine, and the 

 other thirteen days longer. 



In the fecond Vol. of Mr. Lowthorp's 

 Abridgment of the Tbilof.Tranfac. p. 708. 

 is recited an Experiment of Mr. Brother- 

 ton's, <viz. A young Hazel n, Fig. 27, was 

 cut into the body at x z with a deep gam ; 

 the parts of the body below at z, and a- 

 bove at x, were cleft upwards and down- 

 wards, and the fplintcrs x z by wedges were 

 kept off from touching each other, or the 

 4 reft 





