l66 ^he Natural Hijlory 
67. For the better clearing of which ^ozwf, and avoidance of 
the attending dificulties^ it will be but requifite, though two prin- 
cipal parts of our tree be wanting, to reprefent in Sculpture^ at 
leaft a [extant of the body of an Elm cut tranfverfly, together 
with the bar k^nd fith^ as well as the wood, as they all appear in a 
Micro/cope: Which without further trouble, or fufpicion of falf- 
hood, I have carefully taken out of the Anatomy of Trunks lately 
publidi'd by the accurate and ingenious Dr. Grew^ zs'mTab, 10. 
Fig. 2. only with fome alteration of the Letters of dire^ion* 
Wherein 
AB, CD. reprefent the vphote lark, of the tree. ' - 
AB. the skin of the bark. 
CD one kind of fap vefels, ' , 
EF. another ki^d of fap vefels, 
GH. the parenchyma of the bark^berein the Ve/icuU 
are fo exceeding fmallj difficultly to be percei- 
ved by the Microfcope. 
IK, LM, NO, PQ. the great air vefels pojiured chief- ■ 
Ij in rings on the inner verge of every annual 
growth of wood, 
rs, rs, rs. the fmall air vefels poHured in crofs bars, 
TVW thepith, 
XY. the diametral portions , or infertions runing 
through tbe fever al annual rings from thepith 
to the bark: 
Z22Z. the true wood., having been originally the fap 
vefels of the bark- 
now the fap vefels in this diagram being only to be found in the 
Bark,and thofe pafages intercepted at fo great diftances, as above- 
mention'd in our Elm^ the great queftion ftill returns as difficult 
as before, and as far from fblution. | 
68. In the clearing whereof, it mull: firft for certain be an- ] 
fwer'd, that its a great miftake (though it have obtained fo long). | 
that a tree only lives by the afcent of its nouridmient in or be- j 
tween the Bark and the Wood, and that trees muft needs die | 
when once they are bark'd round , here being matter of fadt to 
confute thofe opinions. And fecondly. That it is as certain a 
truth as the other is a mijiake-, that an Elm as well as an Ajh^ or i 
any i 
