C 3^3 1 
0. That thelncreaf© and Growth of a Tree in diick« 
nefs is by th§ defcent of the Sap, and not by the afceot j 
and if there were no defcent, a Tree would Increafebut 
very little, if at all, 
J. That there is a continual Circulation of the Sap all 
the Summer Seafbn, and during fuch time as the Sap is 
llirring, and not a Defcent at Mkhadma^y only^ as fome 
"have held. 
To me it feems very probable, that the Bodies of Plants, 
as well as thoft of moving Animals, are nourifht and in^ 
crealed by a double Food ; the one an impregnated Wa* 
ter, and the other an impregnated Air, and that without 
a convenient fupply of thefe two, the Vegetable cannot 
fubfift, at leaft not increafe. Thele do mutually mix and 
coalefs, and parts of the Air convert to Water, and parts 
of Water convert to An\ As fbme of this latter are rari- 
fyed and freed from their Chains and become Spiritual 
and Aiery, fb others of the fore-mentioned, are cloggeM 
and fettered and become debafed. To this purpofe all 
Plants as well as Animals, have a twofold kind of Roots^ 
one that branches and fpreads into the Earth, and another 
that fpreads and flioots into the Air, both Kinds of Roots 
lerve to receive and carry their proper Nourifhment to 
the Body of the PIant,and both ferve alfo to conveigh and 
carry off the ufelefs Recrements; ufelefs I mean any fur- 
ther within the Body of the Plant, though uleful to it 
when they are feparated, aud without it, the one for Sea- 
foning the Earth and V*/ater wherein it is planted, and 
the o ther for fealoning and preparing the Air,the Method 
of which I have els where expla^^ned. 
Con- 
