120 The Anatomy Book HL 
Tab. 39. 
Tab. 32: 
Tab. 19. 
of Thiffle, Borage, and others, three times as big again 5 appearing in 
the Microfiope, like to the largeft Cells of an Hony-comb. Thole op 
Plum, Worm-wood, Sumach, leis: OF El», Apple, Pear, leier. OF 
Holly and Oak, {till lef. So that the Bladders of the Pith in Borage 
or Common Thifile, are of that Size, as to contain, within the com- 
paß only of their Horizontal Area, about twenty Bladders of the Pith 
of Oak, Wherefore one whole Bladder in Thiftle, is, at leaftan hun- 
dred times bigger, than another in Oak, 
7. $. Of the Size of thefe Bladdersofthe Pith, ‘tis alfo ta be no- 
ted, That it doth not at all follow the size of the Pith it felt but is 
fill varied, according as Nature defigneth the Pith for various ufe. 
Thus, whereas the Pith of Sumach) is Larger than that of Barberry; 
it might be thought, that thé Bladders, whereof it ig compofed, 
fhould be likewife Larger: Yet are they Three times as Sinal] again in 
Sumach, as they arein Barberry. So the Pith of Plum, is far Leß,than 
that of Pear; yet the Bladders of the former are Four or Five times 
as big, as thofe of the latter. Sothe Pith of Hazel is almoft Three 
times as Little again, as that of Holly; yet the Bladders in Hazel, are 
Ten times bigger, than in Holly. 
8. $. The Shape of the Bladders hath alfo fome Variety. For al- 
though, for the moft part, they dre more round ; yet oftentimes they 
are angular: asin Reed.grajs, a Water-plant 5 where they are Gubical; 
and in Borage, Thistle, and many others, where they are pertangular, 
Sexangnlar and feptangular. 
9: $: Of the Texture of the Bladders; *tis alo to be noted, that 
many times, the Sides of the greater Bladders are compofed of lefler 5 
as is often feenin thofe of Borage; Bulrafh, and fome other Plants. In 
the fame manner, as the Sap-Vefels, are but greater Fibres made up of 
lefler. 
to. $. The Pith, though always originally compofed of Bladders, 
and fo One Entire Piece yet in procefs, as the Plant grows up, it hath 
divers openings or Ruptures made in it ¿roftentimes very regularly, and 
always for good ufe,and with conftancy obferved in the fame Species of 
Plants, In Sharp:poynted Dock, many of the Poresare confiderably pro- 
longed by the length, like fmall Pipes. In Walnut it thrinketh up into 
tranfverfe Filmes or Membranes 5 as likewfe fometimes in Spanifh- Broom. 
Sometimes the Pith ishollow or Tubulary :‘either throughot the Trunk , 
as in Thiftle, Endive, Scorzonera, Marfh-Mallow : or fo, as to remain 
entire at every joynt 5 asin Sonchus, Nettle, Teafle 5 in which it is di- 
vided as it were into feveral Stories : and divers other Ways. 
11. $. I SHALL conclude this difcourfe with a further illuftrati- 
on of the Texture Of the Pith, and of the whole Plant, as confequent 
thereupon. I fay therefore, (and have given fome account hereof in, 
the Anatomy of Roots) That as the Veffels of a Plant, Je. the Aer-Veffels 
and the Lywpheduits are made up of Fibres; according to what I 
have in this Difeourf: above (aid 5 fo the Pith of a Plant, or the Blad- 
ders whereof the Pith confifts are likewife made up of Fibres, Which 
is true alfo of the Parenchyma of the Barque, And alfo of the Ty- 
JSertions in the Wood. Yea, and of the Fruit, and all other Paren- 
chymous Parts of a Plant, 1 fay, that the very Pulp of an Apple, 
Pear, Cucumber, Plum, or any other Fruit, is nothing elfe but a Bal! 
of moft extream fmall tranfparent Threds or Fibres, all wrapped an 
fi 
f 
