a 
The Anatomy Book Tit 
Tab. 40. 
4. $. In fome Plants, they are Equidiftant ; in others, not: in 
fome, the Great ones are Equidiftant in others, the Leffler 3 in others, 
both 5 in fome, neither. Which Varieties are not accidental 5 but con- 
ftant to the species in which they are feverally found. 
5. $. They are not always vifibly continued from the Circumfer 
rence to the Centre of the Wood = but in fome Branches, as of Sumach a 
and in molt Trunks of many years growth, declining, in fome places; 
under or over, froma Level, are thercby, upona Tranfverfe Section, 
in part cut away. E 
6. $. They have yet one more Diverlity, which is, That in die 
vers of the aforefaid Branches, they run not only through the Wood 5 
but alfo fhoot out beyond it, into fome Part of the Barque, as in 
Elm, Sumach, Wormwood, &c. Whereas in Pine, and fome of the 
reft they either keep not diftinét from the other parts of the Parenchy= 
ma of the Barque 5 or are fo fmall, as not to be diftinguifhed there 
form. 
7. $ The Texture likewife of thefe Infertions is fomewhat various. 
For in Wormwood, and molt Herbs, they are manifeftly compofed of 
fmall Bladders : differing in nothing from thofe of the Barque or Pith; 
faving, in their being much leG. Yet in Herbs, they are much larger 
than they are in Trees. And in many Trees, as Apple, Pear, Plum, Pine, 
&c. they are either quite loft, or fo fqueezed and prefled together 
by the hard Wood ftanding on both fides, as to be almoft undifcernable. 
8. $. So that although the Parenchyma of the Barque or Pith, and 
the Infertions in the Wood,are of the fame Specifick Nature or Subftance: 
yet there is this difference betwixt them ; That the Fibres of the for- 
mer, are fo Netted together, ás to leave feveral round Vacuities 5 or 
to make a great many little Bladders, whereas, in the latter, they are 
ufually fo far crowded up, as to run (as when a Net is ftretched out E) 
like a Skein of Parallel Threds. 
9. $. Ofthefe Infertions in the Wood, it is futher obfervable, That 
they do not only run betwixt the Lignous Portions; but that many of 
their Fibres are likewife all along diftributed to the feveral Fibres, of 
which the Ligzous Portions confilt,and are interwoven with them; both 
together thus making a piece of Linfj-Woolfj Work, or like many other 
Mannfa&ures in which the Warp and the Woof are of different Sorts 
of Stuff : as in the end of the Fourth Chapter is further explained. 
10. $. THE WOOD is likewife compounded of Two Sorts of 
Bodies ; That which is {trictly Woody ; and the Aer-Veffels mixed here- 
with. The true Wood is nothing elfe but a maß of antiquated Lym- 
pheduös, viz. thofe which were originally placed on the inner Mar- 
gin of the Barque. For in that place, there grows, every year, a new 
ing of Lympheduéts. Which lofing its original fofinels by degrees, 
at the latter end ofthe year, is turned into a dry and hard Ring of 
perfect Wood. 
11. $. So that every year, the Barque of a Tree is divided into 
Two Parts, and diftributed two contrary ways. The outer Part fallech 
off towards the Skin; and at length becomes the Skin it felf. In like 
manner, ashath been obferved of the Skiz cf the Root, Or asthe Cu- 
ticulain Animals, is but the efflorefcence of the Cutis, I fay, that the 
elder shin of a Tree, is not originally made a Skin; but was once, 
fome of the midle part of the Bargue it {elf which is annually calt eh 
and 
