Of OXFORDSHIRE. idy 



any other tree, whatever Experiments may have been made, may 

 anddosfonitimeslive afttr 'tis difbarked, and that therefore there 

 muft be other veffels, beilde thtfap veff'ds of the Bark, capable of 

 the office of conveying fap, fufficient not only for the life, but 

 flourishing condition of a tree. 



6j. And fwch perhaps are a fort of fmall veffels in the very 

 febematifm of the wood at zzzz, not perceptible by a Microfcope, it 

 being on all hands agreed on, that the whole wood of trees, was 

 all heretofore the fap veffels of the Bark : The Bark every year* 

 as Dr. Grew h well obferves, dividing into two parts, and diftri- 

 buting itfelftwo contrary ways ; the outer pan falling off' toward 

 the fkin at A B, and becoming at length the fkin it felf ; and the 

 inner part adding it felf to thewocd, xhzparenchymows part there- 

 of making a new addition to the Injertions at X Y, and the fap 

 veffels, a new addition to the lignou* parts at zzzz (landing be- 

 tween the Infert'wns : So that a Rirg of fap veffels in the Bark 

 this year, becomes a Ring of wood'm the tree the next ; all which 

 maybe perfectly fcen in the great Oak afore-mentioned, (. 45. 

 of this Chapter, and belonging to the fame College) at feveral 

 places where the rind is bruifed off. 



70. And if fo, not unlikely they may fo far retain their anci- 

 ent office of conveying fap, as to keep a tree alive, though not 

 augment it, which perhaps may be one different ufe of thefe fap 

 veffels in the woo;/ from thofe in the bark, thefe being fufficient 

 for the continuation of ztree, and the others ferving only for its 

 augmentation : Which if true, and our tree pad its increafe, as 

 no doubt it has been many years fince ; what need has there been 

 of any fuch thing as the fap veffels of the barky or indeed of the 

 bark, it felf? 



71. Now that this indeed is certainly fo, feems agreed on 

 and confirmed by the learned and ingenious Mr. Willughby and 

 Mr. Raj c ; who have made it appear by irrefiftible experience, that 

 the fap not only afcends between the bark, and the tree, but alfo 

 through the very fubftance of the wood: And by the accurate 

 Dr. Grew d , who allows to the wood, as weMfap veffels as air vef- 

 fels, it being proper to the bark, to have fap veffels only. All 



which put together, feem abundantly to difpel all appearing dif* 



b Compar. Anatom. of Trunks, c. 3. e Philofoph. Traniadt. tfumb.tfi. d Comparat- Anatom. 

 of Trunks, cap. 8. 



ficulties 



