
BookIV, = woe Cg 
Bell, and fome others; the Uzder-Leaves, which differ in Shape from 
the reft, are all at firft formed in the Plame, before it begins to Sprout; 
and the reft afterwards; That is tofay, thatthe former Leaves, are all 
formed (out of Sap from the Trazk ) with the Seed it felf, and fo 
compofe one Principal Part thereof, fc. the Plame: the latter, not till 
after the Seed is fow'n, and fo the Plume fapply’d with Sap imme- 
diately from the Root. Which Sap, it feems, is fo far different from 
the former, as fometimes to produce a different Sort of Leaves. 
5. § SECONDLY, ofthe Buds of all Trees, and of Perenni- 
Stalks, it appears, That they confift of a great number of Leaves, all 
perfectly formed tothe Centre ; where,notwithftanding,they are fome- 
times, not half fo big asa Cheefe-Mite. So that all the Leaves which 
{tand upon a Branch or Cen of one whole Years Growth, were a@u- 
ally exiftent inthe Bud. It isalfo very obfervable, That although 
thefe Buds begin to be expanded not till Sprig, yet are they entirely 
Formed, as to all their Integral Parts, in the Antumn foregoing. So 
that the whole Stock of Leaves which grow upon a Tree, or any Per- 
ennial Stalk, this year; were made, or actually in being, the laft 
year. A greater Heat, more fubtilized Aer, and better concoéted 
FJuyce, being requilite for their Geveration, than for their bare Expan- 
fon and Growth. 
“ 6. §. LASTLY, ofall Avaual Plants, in which there are {e- 
veral Succeflive Generations of Buds, one under another in one year 5 
although I have not made the Remarque, yet amapt to believe, That 
as the Leaves in every Bud are all formed together, as in other Plants : 
fo likewife,that the Succeflive Generations of the Under-Buds, begin at 
certain {tated Terms: as in fome Plants, at every New Aoon in others; 
at the Full Moon; and in fome perhaps; with both, or every 
Fourtnight. 

CAP OV TD 
Of the Manner of the yn! of the Leaf. + Where 
alfo, that of the Two General Parts of 2 Plant, fc. the 
Lignous and Parenchymous, is further explain'd. 
booed HE Vifible Caufes of the Figures of Leaves, have By, Ch, 4, 
AS\* been formerly mentioned. It may here be 
t further noted, That the greater Febers of the 
Leaf, being never Braced in the Stalk; itis a 
3) good preparative for their better fpreading in 
=) the Leaf. Asalfo, that the fame is much favour'd, 
i, by the extream fmalnefs of the Aer-Vefféls here- 
@ in: whereby they are more eafily divaricated,in 



- TAOS the leffer Fibers,and fo the Leaf dilated. 
2. g. BUT thefe and the like are to be reckoned a fecondary Or- 
der of Caufés ; which ferve rather to carry on and improve,that which 
Nature hath once begun. Andtherefore, we muft not only confider Jjea, .53. 
the vifible Mechanifm of the Parts; but alfo the Principles of which 
they are compofed; wherewith, Nature feems to draw her firft 
Strokes. 3. §- 



























































