Vegetable Statkks. i 47 
of their fluid vehicle $ we fhall find that 
nature has made an abundant provifion 
for this work in the ftrufture of vegetables ; 
all whofe compofition is made up of no- 
thing elfe but innumerable fine capillary 
veflels, and glandulous portions or veficles. 
Upon the whole, 1 think we have, from 
thefe experiments and obfervations, fuffici- 
ent ground to believe that there is no circu- 
lation of the fap in vegetables i notwith- 
ftanding many ingenious perfons have been 
induced to think there was, from feveral cu- 
rious obfervations and experiments, which 
evidently prove, that the fap does in fome 
meafure recede from the top towards the 
lower parts of plants, whence they were 
with good probability of reafon induced to 
think that the fap circulated* 
The likeliefl: method elFeaually and con’ 
vincingly to determine this difficulty, whe- 
ther the fap circulates or not, would be by 
ocular infpeftion, if that could be attained : 
And I fee no reafon we have to dcfpair of 
it, lince by the great quantities imbibed and 
perfpired, we have good ground to think, 
that the progreflive motion of the fap is 
Gonfiderable in the largeft fap veflels of 
L % the 
