OfOXFO%T>^SHl%E. i6y 
3ny other tree^ whatever Experiments may have been made, may 
and do's fonitimeslive after 'tis difbarked,and that therefore there 
iiliift be other vefelsy befide the Jap vejjt ls of the Bark, capable of 
the office of conveying y^/, fufficient not only for the life, hni 
ftourifliing condition of a tree. 
6 J. And fuch perhaps are a fort of fmall veffels in the very 
fchematifm of the wood at zzzz, not perceptible by a Microfcope, it 
being on all hands agreed on, that the whole tycoJ of trees^ was 
^11 heretofore the fap vefjels of the Bark : The Bark every year, 
as Dr. Grew^ well obferves, dividing into two and diftri- 
buting it felf two contrary ways ; the outer part falling off toward 
the fkin at A B, and becoming at length the Ikin it felf ; and the 
inner part adding it felf to ihtwood^ the parenchymom part there- 
of making a new addition to the Injertions at X Y, and the (ap 
veffels a new addition to the lignou^ parts at zzzz ftanding be- 
tween the Infertions : So that a Ring of fap veffels in the Bark 
this year, becomes a Ring of wood 'm the tree the next • all which 
maybe perfectly feen in the great Oak. afore-mentioned, (^,45. 
of this Chapter^ and belonging to the fame College^ at feverai 
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 the^e fap 
veffels in therroo^/from thofe in the bark.^ thefe being fufficient 
for the continuation of a tree^ and the others ferving only for its 
augmentation : Which if true, and our tree paft its increafe, as 
no doubt it has been many years fince ; what need has there been 
of any fuch thing as they^/>z/^j^/^ of the bark? 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. Bay 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 who allows to the wood^ as well fap 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-^ 
^ Compar. Anatom. of Trunks, f. 3. ^ Philofoph. Traniadt. Nuw&.^i. ^ Comparat- Anatom. 
of Trunks, cap. 8. 
ficultiei 
