( 220 ) 
in H took up 253 gr. a day cf the Fluid, which waa 
near twice as much as its original fFeigbt, it weighing, 
when firft let in the Water but 127 gr. And after 
all, the daily encreafe of the Plant was no more than 
gr. ^44. 
6. Spring and Rain water contain pretty near an equcl 
Charge of Vegetable Matter : River-ivater more than ei^ 
ther of them. The Plants in the Glalles A. B. and C, 
were at firft of much the fame fze 2ind weight. At the 
End of the Experiment the Mint in A had gain'd 1 5 gr. 
out of 2558 gr. of Spting'Water : that in B gr. 17 and 
an half, out of 3004 gr. of Rain-ucater : bat that in C 
bad got 26 gr. out of only 2493 gr. of River-water^ 
I do not found this Propofition Jolely upon tbefe I'ryals ; 
having made fomemore^ which I do not relate here, that 
agree well enough with thefe. So that the Proportions 
here delivered will hold for the main ; but a firici and 
juji Cornparifon is hardly to be expeded. So far from it, 
that I make no doubt but the Water that falls in rairu, 
at fome times^ contains a greater fizare of terrejirial 
Matter than that which falls at others. Kmoit powerful 
and intenfe Heat muft needs hurry up a larger quantity 
of that Matter along with the kumid Vapors that form 
rain, than one more feeble and remif ever poffibly can. 
The Water of one Spring may flow forth with an higher 
Charge of this Matter than that of another-^ this de- 
pending pardy upoa the quicknefs of the Ebullition, of 
the Water : and partly upon the ^antity of that Mat- 
ter latent in the Strata through which the Fluid pafles, 
and the greater or lefs laxity of thofe Strata, For the 
fame Reafon the Water of one River may abound with it 
more than that of another. Nay the fame River, whea 
much agitated and in commotion, muft bear up more of it, 
than when it m(nie5 with lefs rapidity and violence. 
That 
