Book IIL. of Trunks. 113 
Chanels, not made or bounded by any walls or fides proper to them- 
felves, as a Quil thruft into-a Cork’, and as the Aer-Veffels are in the 
Wood: but only. by the Bladders of the Parenchywas which are fo 
poftured and crouded up together, as to leave certain Cilyndrick Spa- 
ces, which are continued by the length of the Barque. 
36. g. One difference betwixt the Vejels or Chanels now defcrib’d, 
and the Tubulary HoMows and other Apertures in the Pith, 1s this 5 
That thefe never exift originally with the Pith; but are fo many Rupe 
tures {apervening to it inits Growth. Caufed, partly, by the Stretch or 
Tenter it fuffers from the Dilatation of the Wood: (2) and partly, the (4) B.1.0. 
drying, and fo the Shrinking up of its Bladders, and of the Fibres 3. $22 G 
whereof they are compofed. Whereas the faid Vefels in the Bargue, 23 car 
are many of them originally formed therewith. And thofe which are 2 
poft-wate, not made by any Rupture, but only fuch a Difpofition of 
the Pareuchymous Fibres, and Conftipation of the Bladders, as is there- 
unto convenient. 
37. g. In paring the Bargue of a Branch of Pine, Sumach, &c. they 
‘appear, neither parallel, nor any where Inoculated: but run, with 
fome little obliquities, diftin@ one from another, through the length 
ot the Branch: and fo, we may believe, through the length of the 
ree. 











CG: BA BT 



Of the W.0 0 D. 
HE next general Part ofa Branch, is the Wood 5 
k which lyeth betwixt the Barque and the Pith, 
' And this likewife evermore confifteth of Two 
General Parts, fc. of a Parenchymous Part, and 
that more properly called Lignous. The Pa- 
renchymows Part of the Wood, though much di- 
ye verfifyed, yet in the Trawks of all Trees what- 
Ve foever,hath this property, To be‘difpofed into 
“<9 many Rays, or Diametral Infertions, running be- 
twixt fo many Liguous Portions, from the Barque to the Pith: as in 
any of the Quarters here before us may appear. 
2. §. But thefe Infertions are much diverfifyed, according to the 
feveral Sorts of Plants. Soin Barberry, Afh, Pine, Worm-wood, they Tb, 23; 
are lefS numerous. In El, Walluut, Fig, Sumach, they are more. tg 35, 
And in Holy, Pear, Plum, Apple, Oak, Hazel, are moft numerous. : 
3. §. The fame Infertions, in Barberry, Wormwood, and fome in 
Oak, are very Thick. In Pine, Fig, Afh, of amiddle Size. In Pear, 
Holly, and moft of them in-Ozk, are exceeding Small. Again, in Bar- J}jd, 
berry, Elm, Afh, Sumach, Fig, they are of anEqual size. In Holly, 
Hazel, Pear, Plum, Oak , they are very Unequal: {ome of thofe in 
Folly, ‘being Four or Five times thickerthan the reft3 in Play, six 
or Seventimes; andinOak, Ten times at yo ; 
: 4. §, 






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