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16 The Anatomy Book I- 
25. g. Yet as the Lignous Rody is the Principle of Motion in the 
Cortical 5 fo the Cortical is the Moderator of that in the Lignous : As in 
Animal Motions, the Principle is from the Nerves; yet being once gi- 
ven tothe Méufcle or Limb, and that moving proportionably to its ftru- 
Gure, the Nerves alfo are carried in the fame motion withit. We fup- 
pofe therefore, that as the principal motion of the Ligwous Body is in 
length, fois its proper tendency alfo to Afcend. But being much exceed- 
ed both in Compafs and Quantity by the Cortical, as in the fmaller parts 
of the Root it is; it muft needs therefore be over-born and governed 
by it; and fo, though not lofeits motion, yet make it that way where- 
in the Cortical Body may be more obedient to it 5 which will be by de- 
fcent. Yet both of them being fufficiently pliable, they are thus capa- 
ble, where the Soyl may oppofe a direét defcent, there to divert any 
way, where it is more penetrable, and fo to defcend obliquely. For 
the fame reafon it may alfo be, that though you fet a Beaw with the 
Radicle upward; yet the Radicle, as it fhoots, declining alfo gradu- 
ally, is thus arch'd in form of an Hooks, and fo at laft defcends. For 
every declination froma perpendicular Line, is a mixed motion be- 
twixt Acent and Decent , as that ofthe Radicle alfo is, and fo feem- 
ing tobe dependent upon the two Covtrary Tendencies of the Lignous 
and Cortical Bodies. What may be thecaufe of thofe Tendencies (be- 
ing moft probably external, and a kind of Magnetifme) 1 thall not make 
my Task here to enquire. 
26, §. Now although the Liszous Body, by the pofition and fhape 
of its Pores, principally groweth in lengths yet will it in fome degree 
likewife in breadth: For it cannot be fuppofed that the pureft Sap is 
all received into the {aid Pores; but that part thereof likewife, ftaying 
about its Superficial Parts, is there tinfur'd and agglutinated to them. 
And becaufe thefe Pores are prolonged by its length; therefore it is 
much more laxe andeafily divifible that ways as in flitting a Stick, or 
cleaving of Timber, and in cutting and hewing them athwart is alfo 
feen. Whence itcomes to pa, that in fhooting from the Center to- 
wards the Circumference, and there finding more room, its faid origi- 
nal Laxity doth eafily in divers places now become greater, and at 
length in open Partments plainly vifible. Betwixt which Partments, 
the Cortical Body, being bound in on the one hand, by the furround- 
ing Ski and Moulds, and prefled upon by the Ligvons on the other, 
mutt needs infert it elf, and fo move contrary to it, from the Circum- 
ference towards the Center. Where the faid contrary motions continu- 
ed as begun, they at laft meet, unite, and either make or augment the 
Pith. And thus the Root is fram’d, and the Sk, the Cortical and 
Lignous Bodies,fo asis faid,thereunto concurrent. We fhall next fhew the 
weet the twoother Parts, ce. the Infertment and Pith; and firft of the 
Pith. 
27. §. ONE true uf of the Pith is for the better Advancement of 
the Sp, whereof I fhall {peak in the next Chapter. The ufe I here 
obferve, is for the quicker and higher Fermentation of the Sap: For 
although the Fermentation made in the Cortical Body was well fubfer- 
vient to the firft Vegetations, yet thofe more perfect ones in the Trunk 
which after follow, require a Body more adapted to it, and that isthe 
Pith ; which is fo neceflary, as not to be only common to, but con- 
fiderably large inthe Roots of moft Plats; if not in their inferiour 
y parts, 




