116 
E Tbe Anatomy Book III. 
vity, than any other in the Wood, In the Wood, I fay 5 forin the Barque, 
there are many Sap-Vefels bigger than the biggeft Aer-Vefels that be 
18. $. The Varitics hereof are very many; in refpect both of their 
Number, Size, and Pofition; being,'as to thefe, the fame, in no two 
Sorts of Plants whatfoever. Firft in refpe& of their Number. So in 
Hazel, Apple, Pear, they are very numerous; but in different degrees: 
and are reprefented in the Figures already referred to, by all the black 
fpots in the Wood. In Holly, Plum, Barberry fomewhat numerous, In 
` Oak, Afb, Walnut fewer. In Pine, and others of that Kindred, very 
Tab. 22, 
23,25, 
24, 28, 29. 
33 
Tab. 25, 
30, 31. 
Tab. 22. 
03032) 
few; fe. fewer than in any other kind of Plant. 
19. $. Secondly, in refpeét of their Size 5 which from the firft or 
greateft, to the leaft, may be computed eafily to about Twenty Degrees. 
‘Thus, many of thofe in Elw, A, Walnut, Fig, Oak, are very large. In 
Barberry, Plum, not fo large. In Hazel, Sumach, fmaller, In Holly, 
Pear, of a {till finaller Size. Sothat many of thofe in El», or Oak, 
are Twenty times bigger, than thofe in Holly or Pear. 
20. $. Inan ordinary joynted Cane, they are fo wide, that if you 
take one a yard, or a yard and $ long,and putting one end into a Ba- 
fin of Water, you blow ftrongly at the others your Breath will im- 
mediately,pafs, through the Aer-Veféls, the length of the Cane, fo as to 
raife up the Water into a great many bubbles. 
21. $. And as they have a different Size in divers Kinds of Plants 5 
fo likewife, according to the place where they ftand, in the felf fame. 
So in Holly, Hazel, Apple, their Size is more equal throughout the 
bredth of the Tree. But in Barberry, Elm, Oak, Alb, very different: 
Not fortuitoufly, but always much after the fame manner. For in all 
the laft named Branches, the Aer-Vefels that ftand in the inner margin 
of cach annual Ring, are all vaftly bigger,than any of thofe that ftaud 
in the outer part of the Ring. 
22. $. Thirdly, thefe Aer-vefels are alfo different in their Sitna- 
tion. So in Apple, Wallmut, Fig, they are fpread all abroad in every 
annual Ring; not being pofited in any one certain Line. In others, 
they keep more within the compafs of fome Line or Lines; either Di- 
ametral, or Peripkerial. Soin Holly they are Radiated, or run in even 
Diametral Lines betwixt the Pith and the Barque. So alfo are fome of 
of them in Hazel; and fome few in Wallaut. 
23. $. Whether they ftand Irregularly, or are Radiated, it is tobe 
noted, That Nature, for the moft part, fo difpofeth of them, that 
many ofthem may (till ftand very near the Infertions. So in Apple, 
fhe ‘will rather decline making an even Eine; or in Hell y, will rather 
break that Live into Parcels, than that the Zer-Fejfels {hall (and re- 
mote from the Infértions. To what end this is done, fhall be fd 
hereafter. 
24. $. . Again, in Afb, the Aer-Vefels are none of them Radiated, 
but moft of them ftand in Circles on the inner Margin of every annu- 
al Ring, Which Circle is fometimes very thick, asin A/h and Barberry. 
In others but thin, the Vefels ftanding, for the moft part, fingle 
throughout the Circles 5 as in El». Sometimes again, they both make 
a Circle, and are alfo fpread abroad 5 n Pear and Plum. 
25. $. Thofe likewile which are fpread abroad, are fometimes Re- 
gularly pofited. So in Barberry, befides thofe larger, that make the 
Circle, there are other fimaller ones, that ftand, in oblique i 
athwart 
