i 6 Vegetable Staticks. 
near eleven times the velocity thro’ the fur^ 
face of the roots, that it does thro* the fur- 
face of the leaves. 
And fetting the roots at a medium at 12 
inches long, they muft occupy a hemifphere 
of earth two feet diameter, that is 2. i 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 neceffity of cut- 
ting off many branches, from a tranfplanted 
tree : for if 256 fquare inches of root in 
furface was neceffary to maintain this Cab- 
bage in a healthy natural ftatc : fuppofe upon 
digging it up, in order totranfplant, half the 
roots be cut off (which is the cafe of moft 
young tranfplanted trees) then it’s plain, that 
but half the ufual nourifhment can be car- 
ried up, through the roots, on that account j 
and a very much lefs proportion on account 
of the fmall 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 ex- 
perience) ftrongiy - evinces the great necef- 
fity of well watering new plantations. 
Which 
