C 480 ) 
the water purged flioc not more but one root which grew very 
long , and on the ninth day only it began a little to ftooc another, 
Which lengthened but one line in two daies^ whereas the twigg in 
the common water had then nine or ten roots, which were all 
very long , having alwaies lengthened five lines or more in a 
day. 
Although this Experiment appear'd at firft contrary to the 
precedent, yecitftill confirmed che firft thought, to wit, that 
the Air which is mixed in common water ferves for vegetation » 
confidering the little root which the twigg fhot in the water clean- 
fed of Air. Meantime I do not believe , it will be cafie to 
know the particular reafon, which made the firft root Ihoot fo 
foon. 
After this, Lmade feme Experiments upoa ^rW^r Plants. One 
day I put a green piece of Sallorv-v^ood , part in the Air and part 
mvacuoy after the manner above defcribed. I put into water 
that part which was in the Air, and the water prefently began to 
mount and to pafs through the middle of the wood, and unccffant- 
ly form'd bubbles in the Receiver. Thefe bubbles continued 
thus for thefpaceof 24 hours; and certainly it was the water ^ 
which pafling thorow the wood was in part changed into Air. For, 
ImadethefameExperiment withapieceof B/sj^ J and the water 
mounted alfo andpafled through it, but it formed no bubbles. 
Meantime, if there be f'ahes in wood, they muft needs be unable 
to refift the preirure of the Air 5 for I have noted in Sallow, as 
well as in Elm, that the water pafles through them with the fame 
facility what endfoeveryou pntin'yacuo. 
One daya'fo I put the upper end of a little Elm-hrzucb in the 
'VAcmm^ and the lower end in the Air. This lower end [drench- 
ed in water, as I had done the Roots of Baulme in the firft of thefe 
Experiments: But it was a whole hour before there appear d a- 
ny drep of water upon the £/w-leaves invaeuo^ whereas upon the 
£^«/»sie-leaves the drops appeared prefently. Thecaufe of v^^hich 
may be the hardnefs of Elm-wood, But I know not , why water 
-pafling through forms bubbles, and in pafTing through leaves 
forms nothing but drops. 
I made alfo the Experiment the other way, that is, the Leaves 
in the water without the Recipient,and the Jower end of the branch 
m v4cuoy and I faw, that there paflTed nothing for two hours time 5 
in- 
