Of yegetation. 333 
tended to their full length. And we may 
cafily conceive how the longitudinal capil- 
lary tubes ftill retain their hollownefs, not- 
withftanding their being diftended, from the 
like effeft in melted glafs tubes, which re- 
tain a hollownefs, tho* drawn out to the 
fineft thread. 
The whole progrefs of the firft joynt r 
is very fhort in comparifon of the other 
joynts 5 becaufe, at firft fetting out its leaves 
being very fmall, and the feafon then cooler 
than afterwards i 'tis probable, that but lit- 
tle fap is conveyed to it, and therefore it ex- 
tending but flowly, its fibres are in the 
mean time grown tough and hard, before 
it can arrive to any confiderable length. 
But as the feafon advances, and the leaves 
inlarge, greater plenty of nouriftiment be- 
ing thereby conveyed , the fecond joynt 
grows longer than the firft, and the 3d and 
4th ftill on gradually longer than the pre- 
ceding 3 thefe do therefore in equal times 
make greater advances than the former. 
The wetter the feafon, the longer and 
larger (hoots do vegetables ufually make ; 
becaufe their foft duftile parts do then con- 
tinue longer in a moift; tender ftate j but 
in 
