"3 





es 



for- 



years 



Ml 

 -per- 

 mt of 



IS cut 



:ard's 

 5 now 



F 



St this 

 inches 

 ives of 

 n fi ze, 



nether 

 eiafflc 



it from 



ud dies 



[ice re- 

 gards ; 



wa 



-m 



new 

 cai>' 



\^^ 





bu^s 



-u 



Sect. XV. 2.3. 



OF 



F RUITS. 



399 



In this curious clrcumftance the caudexes of the buds of the tree 

 above the decorticated part feem. to have emitted Ihort radicles into 

 the alburnum. ; the veffels of which muft thus have aclcd as capillary 

 tubes between the upper a«d lower caudexes of thofe buds ; as capil- 

 lary tubes will raife water by the attradion of their internal furfaces 

 nearly to their fuinmits, when they are not too high in proportion ^- 





their diameter 



but water w 



cafe flow 



their fummits 



but will always ftand with 



furfacc below the upper moft 



rim of the tube, in which fituation it may readily be abforbed by ve. 

 cretabk radicles J and may be fupplied from beneath by the fap-juic 

 ^aifed by the vegetable aaioh of the abforbent veffels of the caudexes 

 whofe radicles terminate in the earth. 



It is cuftomary to debark oak trees in the fpring,. which are intend 



cd to be felled in the enfumg autumn j 



eafier at this feafon j and the fap-wood, 



become harder, and more^urable, if the tree remains till the end of 



fummer. The trees thus ftripped of their bark put forth flioots as 



ufual with acorns on the fixth, feventh, and eighth joints, like vines ;. 



but in the branches I examined the joints of the debarked trees were 



becaufe the bark comes 



off 



alburnum 



believed 



'( 



r 



much ihorter than thofe of other oak 



th 



were more 



merous 



bore 



d no new buds were produced above the joints which^ 

 From hence it appears, that the branches of decorticated^ 



And fe- 



to obtain 



oak-trees produce fewer leaf-buds, and more flower-bud 



dly, that the new buds of debarked oak 



continue 



moifture from the alburnum after the feafon of the afcent of the fap 

 in other vegetables ceafes ;; which in this unnatural ftatc of the de- 

 barked tree'may ad as capillary tubes, like tlie alburnum of the fnaall 

 debarked cylinder of a pear-tree above mentioned 



\ 



the veffels 



of the alburnum may not yet have loft their vegetable life, they may 

 continue to abforb fap-juice or water from their radicles, and carry 

 it to the buds at the fummits by their fpiral contradions as in the 



bleeding feafon. 



It 



V 



* 



