Of the Roots of Plants. 243 
cutting a very thin tranfverfe Hice of the branch of a tree, 
and holding it againft the light, or placing it before the 
microfcope. In currant and goofeberry-trees it is lefs 
confpicuous than in oak or plumbs, in damfins it is more, 
and in elder and vines more; the cortical body doth not 
only furround the wood, but is as it were wedged into it 
in many places, and is even inferted therein as far as the 
pith, and appears in a tranfverfe fedtion of a root-like lines 
drawn from the center to the circumference. 
Fig. 466. reprefents a tranfverfe fiice of the root of 
afparagus, and fig. 467. exhibits a microfcopic pidture of 
a piece thereof cut out at a b, in which A B fhews 
the fkin : A B C D the bark, or all that part analo¬ 
gous to it: C D E F the lymphaedudts on the inner edge 
of the bark : E F G H the wood in which the black 
fpots fhew the air vefiels : GUI the pith. 
Fig. 468. is a tranfverfe fiice of the root of mallows. 
Fig. 469. reprefents a piece thereof, which was cut out 
* 
at c d, as it appeared before the microfcope; in which 
A B C D fhews the fkin ; CDEF the bark, or all that 
part of the root which anfwers to it, in which the round 
fpots are the mucidudts : E F G H the common lymphzs- 
duels : GHIK the pithy part of the root: IK L more 
lymphaedudts, in both which the black holes are the air 
vefiels. 
Fig. 470. reprefents a fiice of a vine root Cut tranf- 
verfly, out of which at e f was cut a fmall piece, which 
when placed before the microfcope appeared as repre¬ 
sented by fig. 471. wherein AB fhews the fkin: AB 
C D the bark : L S parcels of fap vefiels : L I parcels of 
wood in which the darker fhaded circles great and fmall 
are the air vefiels: EF parenchymous infertions between 
the parcels of wood : G G others within them, 
R 2 
At 
