Of the Fruit. 299 
are alfo difperfed round about the fruit, for about the 
thicknefs of the third of an inch, as will appear on apply-* 
ing a tranfverfe dice of a pear to the microfcope. 
The outer parenchyma is of the fame original and ge¬ 
neral Arudture as in an apple, but the bladders not alto¬ 
gether fo long with refpedf to their breadth. 
The bladders here have alfo a different pofltion from 
that they have in an apple, being in that all Aretched out 
towards one common center, which is that of the apple 
itfelf. But here they every where bear a refpedf to the 
faid tartareous grains, every grain being the center of a 
certain number of bladders. 
Throughout this parenchyma, the veffels for fap and 
air are likewife difperfed into fifteen principal branches. 
The five utmoA make as many arches, but commonly 
not fo deep as in an apple; from thefe fome fmall fibres 
are difperfed throughout the parenchyma. The ten inner 
branches proceeding to the feed, and from thence with 
the other five to the flower. 
Next the core Aands the inner parenchyma, confifiing 
of fmall roundifh bladders, anfwerable to that of the pith, 
from which it feems to be derived. 
Between this and the outer parenchyma, the faid tar¬ 
tareous grains begin (firA) to fiand nearer together, to 
grow bigger, and of a more unequal furface; and by 
degrees to unite into a body, in fome pears, and efpecially 
towards the core, they are almoA as hard as a plumb-Aone. 
On cutting a pear lengthwife, through its center, thefe 
tartareous grains will be apparent. 
At the bottom of the core in moft pears, and a little 
below the center of the fruit, is a kind of umbelical knot; 
from whence extends a Areight channel, which opens at 
the middle of the core or Aool of the flower, fcarce wide 
enough to admit the fmalleft pin. 
Of 
