(2122) 
twigs and fmall roots will not both of them bleed freelier 
from the parts feparated^ in proportion to their bignefs > 
3, And if it (hall not fo prove in the Tryal, that in cold 
weather the Sap moves inwards from Root and Branch 
to the Trunkj and that upon the breaking of a Froft, the 
Sap moves outward from the Trunk to the extremities of 
both Root and Branch 5 I fay, if this prove not fo, whe- 
ther there be any different motions of Sap at a time in the 
divers parts of one and the fame Tree 5 and where fuch 
motions of Sap begin, and whither they tend ? 4 Whether 
theSap^ when it will run, moves longer in the Branches 
than in the Roots; or whether it begin not to move in all 
pate of a Tree at a time^ and reft every where at a time? 
5- When it refts,whether it retires to the Body of the Tree, 
from the Roots and Branches, or finks down to the Root, 
or is any way fpent by infenfible fteams, or is quiet and 
lodged in every part of the Tree in proportion ? 
1 (hall long to hear the fuccefs of your Experiments in the 
Queftion of the Circulation of the Sap* I have many years - 
been inclined to think , that there is fome fuch motion ia 
the Juyces of Vegetables. The realbns which induced 
me^are; i. Becaufe I finde^ that all the Juyce of a Plant 
is not extravafateand loofe^ and like Water in aSpunge, 
but that there are apparent Veflels in Plant?, analagous to 
Veins in Animals: which thing is moft confpicuous and 
clear in fuch PlantSj whofe Juyce is either White or Red, 
or Saffron colou^'d j for inftance, in each kind of Juyce 
v>^e propofe Laffuca^ Atra&'Uts^ Chelidoniu??^ majus, 2. Be- 
caufe that there are very many Plants ( and thefe laft na- 
med are of the number ) whofe Juyce feems never to be at 
reft, but willfpring at ail times freely, as the Blood of 
nimalsj upon Incifion. 
The way of Ligature by Metalline Rings, byyou men- 
tion d, is an Expedient I have not ufed 5 but other Liga^ 
tures I have, upon a great number of our Englifti Plants, 
Dot without the difcovery of many curious Phienomena. 
The fuccefs of an Experiment of this Nature upon Catapw 
$ia minor LobcL was as followes ; I tied afilk-thread upon 
one 
