magnitude, order, diftribut!OD% . ire Aad yet neither 
of tbele helps in our hands has fatisfa<9:orily difcovered to 
us other particulars belonging to thtfc veffels, as external 
Figure, Coats, Gavitie, &c. 
The fubftance of thcfc veins feems tb be as truly Mem- 
hramm^ as the Veins of Animals: A Leaf will not give way 
and be extended , but the Veins in a leaf^if freed of all the 
woody Fibres, will be ftretched out to one third part at 
leaftj and vigoroufly reftore themfclves again, juft like a 
Vein, Gut, or any other membranous duBu^ of an AnimaL 
Again chefe membranous Pipes are exceeding thin and 
traufparent, becaufe they fuddainly difappear and fubfidc. 
after their being exhaufted of their Juice ; aad particular- 
ly in that we fee the liquor, they hold^quite through thera, 
no othcrwife than the blood through our Veins, or fin Che- 
Udonium majm, for example^ a tinSure of Saffron in Cry- 
ftalline Pipes. 
Concerning the External Figure of thefe Veins and Ca- 
vitie^ as well as other Accidents, we thought, they would ? 
have been made more apparent to us, if it were poflible to . 
coagulate the Juice they hold without much ftrinking the 
plant. We were in great hopes. Freezing would have eft 
feded this which though it did not fucceed as we promi- 
fed our (elves, in rcfpcd of the manifeftation of thefe Ac*, 
cidents ^ yet it gave us fome further light into the nature 
of the Juice of thele veins* In the keeneflr froft, which 
hapned the other winter, we difleded the frozen leaves of 
the Garden Spurge^ Here wc obferved, that all the Juice 
Cbclides that which thefe veins hold) was, indeed, frozeai 
into perfect hard Ice, and to be exprefled out in the figure 
of the containing pores; but the Milfcie- Juice was as liquid ^ 
as ever, but notfo brisk as inopen weather. 
This Experiment we take to be good proof of the per^ 
feiftion of this Milkie Juice, and that it hath within it felf ^ 
fo great a degree of fermentatioD, that it preferves it felf 
andconfequently the whole plant from the injuries of the 
weather 5 that is, the plant owes its life to in. Thus we h^ve 
feei3 ^ 
