2 56 Of the Trunks of Trees . 
Fig. 483. fhews a tranfverfe dice of a hazel branch, 
and fig. 484. reprefents a piece thereof, which was cut 
out at c d, as it appeared when placed in the microfcope, 
A B the Ikin: A B C D the bark: QJ^Q. the fimple 
parenchyma: H I a ring of fpecial vefiels : P P common 
fap vefiels : C D E F the wood of three years growth : 
K L M N one year’s growth : XXX great infertions : 
P O lefier between them, the black parcels between thefe 
infertions are the wood, which is compofed of minute 
tubes (although it is here reprefented in a (hade) in which 
the dark fpots are the air vefiels : E F G the pith. 
Fig. 485. exhibits a tranfverfe dice of a walnut branch, 
and fig. 486. a microfcopic picture of a gore thereof cut 
out from e f, in which A B is the fkin: A B C D the 
bark: RR the parenchyma: HR I two rings official 
fap vefiels: D C common lymphaedu&s: D CEF the 
wood of four years growth: d d d the true wood: 
KLM N one year’s growth ; Q_fecond part thereof whiter 
than the reft, by the mixture of fap vefiels, which are re¬ 
prefented by tranfverfe lines : M N the great air vefiels 
c e, c e parcels of lefier ones : E F a ring of other fap 
vefiels : E F G the pith. 
At fig. 487. is feen a dice of a branch of pine cut 
tranfverfly, and at fig. 488. a magnified piece of the fame 
cut out from g h. A B C D the bark : MMM the 
parenchyma : D L C the lymphaeducfs : H H turpentine 
vefiels: DCEF the wood in which the white fpaces 
tending to the center Ihew the infertions : E F G the 
pith, the larger holes both in the wood and pith are more 
turpentine vefiels. 
Fig. 489. reprefents a tranfverfe fection of a wormwood 
ftalk, from whence a piece i k was cut, which is ex¬ 
hibited as it appeared in the microfcope, by fig. 490. 
whereof AB C D is the bark : AMB the parenchyma : 
HMI 
