2$6 
Of Leaves. 
the Eyes is probably owing to their lharp 
Stalks that prick and wound them *. 
CHAP. XLVII. 
Of Leaves. 
t 1 HE Leaves of Trees or Plants are full 
of innumerable Veins and Ramifica¬ 
tions, that convey the perfpirable Juices to 
the Pores, for their Difcharge. Whether or 
no there be any Circulation in them is ftill a 
Matter of Doubt; but as their Juices, when 
let out, immediately break, coagulate, and 
become a ftiff Jelly, it feems probable there 
may be fome Circulation, which prevents 
the fame Effed in the Veffels. The fudden 
fhrinking, doling, and opening of Flowers, 
the railing and linking the Heads of Poppies, 
&c. the vermicular Motions of the Veins of 
Plants when expofed to the Air, feem alfo to 
imply famewhat like Senfation. The Micro - 
Jcope may perhaps be of Service to difcover 
much more on thefe Subjeds than we yet 
know. 
* A Puff-Ball being burlt near the Eyes of a Boy of twelve 
Years old, by an unlucky Play-fellow, and the Duf t ereof 
flying into them,occafioned fuch Swelling, Inflammation, and 
intenfe Pain, with a continual Difcharge of Water, that he 
could not open them for feveral Days ; and did not recover 
his Sight in lefs than a Fortnight, though all the Remedies 
that could be thought on were applied. Vide Joh. Muys, 
Prox . Chirur* Ration . Obferv, I. 
Mr. 
/ 
