Of Vegetation. 3 5 t 



Seed-roots, into the radicle c z d- y which 

 radicle, when it has fhot fome length into 

 the ground, does then imbibe nourifhment 

 from thence ; and after it has acquired fuf- 

 ficient ftrength, as this tender ductile root 

 is extending from z to r, it muft necefla- 

 rily carry the expanding Seed-lobes upwards, 

 at the fame time that the dilating from z to 

 d makes it fhoot downwards ; and when 

 the root is thus far grown, it fupplies the 

 Plume b with nourifhment, which thereby 

 fwelling and extending, opens the lobes a r, 

 a r, which are at the fame time railed 

 above-ground with the Plume; where they, 

 by expanding and growing thinner, turn to 

 green leaves (except the Seeds of the Pulfe 

 kind); which leaves are of fuch importance 

 to the yet tender Plume, that it perifhes, or 

 will not thrive if they are pulled off; which 

 makes it probable, that they do the fame 

 office to the Plume, that the leaves adjoining 

 to Apples, Quinces, and other fruits, do to 

 them, viz. they draw fap within the reach 

 of their attraction; fee Exper. 8. and 30. 

 But when the Plume is fo far advanced ia 

 growth, as to have branches and expanded 

 leaves to draw up nourifhment ; then thefe 

 fupplemental feminal leaves, a r, a r, being of 



no 



