( 3*7 ) 
“ diately above them ; not only on the account of 
Primogeniture, but alfo becaufe being inferred in 
“ larger parts of the Trunk, and nearer the Root, 
“ they have the advantage of being ferved with great- 
er plenty of Sap, whence arifes the beautiful para- 
bolical Figure of the Trees.' 
“ But when Trees (land thick together in Woods or 
“ Groves, this their natural Shape is alter’d ; becaufe 
“ the lower lateral Branches being much fhaded, they 
“ can perfpirelittJe,* and therefore drawing little Nou- 
“ riHiment, they perifh : But the Top-Branches being 
“ expofed to a free drying Air, they perfpire plenti- 
“ fully; and thereby drawing the Sap to the Top, 
“ they advance much in height. But vice verfi, if 
“ when fuch a Grove of tall Trees is cut down, there 
“ be left here and there a fingle Tree, that Tree will 
“ then fhoot out lateral Branches; the Leaves of which 
“ Branches now perfpiring freely, will attract plenty 
of Sap ; on which account, the Top being deprived 
“ of its Noufilliment, it ufually dies. » 
“ And as Trees in a Grove or Wood grow only in 
“ Length, becaufe all the Nourilhment is by the Leaves 
“ drawn to the top, mod of the fmall lateral HiadedBran- 
“ ches in the mean time perifliing for want of Perfpira- 
“ tion and Nutrition : So the cafe is the very fame in 
“ the Branches of a Tree, which ufually making an An- 
“ gleof about 45 Degr. with the Stem of the Tree, do 
“ thereby beautifully fill up at equal and proper Diftan- 
cesthe fpace between the lower Branches and the top 
“ of the Tree, forming thereby as it were a parabolical 
** Grove or Thicket ; which fhading the Arms, the 
“ fmall lateral Shoots of thofe Arms ufually perilh for 
want of due perfpiration ; and therefore the Arms 
“ continue naked like the Bodies of Trees in a Grove; 
‘‘ all the Nourifliment being drawn up to the tops of 
V u z the 
