( 202 ) 
my Defign in thefe being only to inform my felf, whe- 
ther any Water exhaled out of the GlalJeSy otherwife 
than thorow the Bodies of the Plants. The Orifices of 
thefe Two GlafTes were cover 'd with Parchment j each 
piece of it being perforated with an hole of the fame 
bignefs with thofe of the Viols above. In this I fufpended 
a bit of Stick about the thicknefs of the Stem of one of the 
aforefaid Plants^ but not reaching down to the Surface of 
the included Water. I put them in tlius, that the Water 
in thefe might not have more fcope to evaporate than that 
in the other Viols. Thus they flood the whole 77 days 
in the fame Window with th^ reft ; when, upon Exa- 
mination, I found none of the Water in thefe wafted or 
gone off, Tho' I obferved, both in thefe^ and the reji, 
efpccially after hot Weather^ fmall drops of Water^ not 
unlike I)ew^ adhering to the infdes of the Glaffes, that 
part of them I mean that was above the Surface of the 
cnclofed Water. 
The Water in thefe two Glaffes that had no Plants in 
them, at the end of the Experiment, exhibited a larger 
quantity of terreftrial Matter than that in any of thofe 
that had the Plants in them did. The Sediment at the 
bottom of the Viols was greater : and the Nubecula dif- 
fused through the Body of the Water thicker. And of 
that which was in the others, fome of it proceeded from 
certain fmall Leaves that had fallen from that part of the 
Stems of the Plants that was within the Water, wherein 
they rotted and diffolved. The terrefirial Matter in 
the rain Water was finer than that in the fpring Water ^ 
