i 



• 'a. 



M. 





IS 



• r 



nior 



« 



^^eiidj. 



^Ol) 







? 



, orb,, 



-ark is 

 *r-buds 



ve 



hich 



will 



require 



spends th 



e 



er-budsMr. 

 with ilroiicr 

 r cuts, what 



^3 the bark 

 I ley on Car- 

 ers and fruit 

 I bark, three 

 7e, (PhiloC 

 f this work, 



^t put 



ro 



'jnd 



inarafted 



an ingra 



callu 



s 



P 



hichareiiT- 

 bark z^^^' 



1, IS 



i; 



J 



bcl:ev^>- 



) 



\ of fam^^'' 



;' enfuing ^^^ 

 The tree^ 



lia 



corns 



on 



\ 



•he bra" 

 {horter 



cbeJ 

 than 



O'JSJ 



a 





Sect. IX. 2. 9. 



SEEDS, BUDS, BULBS. 



'59 



new buds were produced above the joints which bore acorns. Fronn 



h 



ence 



PP 



th 



th 



bratiches of debarked oak 



prod 



fewer leaf-bud 



an 



d 



more flower-buds; which muft be owing to 



mpoffibility of their producing new caud 



dow 



th 



e 



ked 



branches and flem for the embryon progeny of leaf-buds. 



The pullulation of leaves on debarked oaks denionftrates, that the 

 refcrvoirs of nutriment depofited in the preceding fumrner for the ufe 



f the vernal buds muft be 



IburnunQ : and that it is this fac 



charine matter which induces the alburnum to ferment and rot foo 

 than the internal wood. Thus Dr.Walker found on nice infpe6l 



the fap-juice to flow from 

 well as between them, wh 

 trized part, and alfo bet' 



the lis; 



f th 



freOi piece 

 the wood 



; alburnum as 

 fF from a cica- 



d the bark 



Edinb 



Tranfa6l.Vol. I. He alfo obferved that oak, afh, elm, afpen, h 



d hawthorn, d 



bleed ; and that the birch, plane, and mapl 



bleed 



mofl: 



d th 



th 



rey willow, fal 



prea, does not 



bleed, but the fiip-juice rifes vifibly between the wood and the bark, 



irate eafily from the wood. From all 



th 



facch 



matter, which 



{q as to make the bark feparate ( 



thefe fa(5ls it may be inferred, that 



difTolved in the fap-juice, is depofited in the autumn in the roots of 



fome trees, and in the alburnum of others, or in both ; as manna is 



found in the wood of the manna-a(h ; and fugar in the joints of many 



grafles and of the fugar-cane, and in the roots of liquorice, beets, and 



\ 



many other herbaceous vegetables. 



9. About Midfummer, after the new buds appear in the bofom of 

 every leaf, many authors have remarked that there feems to be a kind 

 of paufe in vegetation for about a fortnight, which they have afcrib- 

 ed to different caufes. At this time I fufpe6l the refervoir of nou- 

 rifhment for th^ new buds is forming about the roots or in the albur- 

 num of the tree; and that the caudexes and umbilical veffels of the 

 new buds are alfo at this time forming down the bark, and terminate 

 in thofe nutritious refervoirs in the roots or new alburnum like the 



umbilical 



