1 6 Vegetable Statich . 
near eleven times the velocity through the 
furface of the roots, that it does thro' the 
furface of the leaves. 
And fetting the roots at a medium at 1 2 
inches long, they muft occupy a hemifphere 
of earth two feet diameter, that is, 2. 1 cu- 
bick feet of earth. 
By comparing the furfaces of the roots of 
plants, with the furface of the fame plant 
above ground, we fee the necellity of cut- 
ting off many branches, from a tranfplanted 
tree: For if 256 fquare inches of root in 
furface was neceflary to maintain this Cab- 
bage in a healthy natural date : fuppofe upon 
digging it up, in order to tranfplant, half the 
roots be cut off (which is the cafe of rneft 
young tranfplanted trees) then it's plain, that 
but half the ufual nourifliment can be car- 
ried up, through the roots, on that account . 
and a very much lefs proportion on account 
of the fmail hemifphere of earth, the new 
planted fhortened roots occupy 5 and on ac- 
count of the loofe pofition of the new turn- 
ed earth, which touches the roots at firft 
but in few points. This (as well as experi- 
ence) ftrongly evinces the great necellity of 
well watering new plantations* 
.Which 
