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increafing the firmnefs and rigidity proper for plants, 
that the hours of light are the time for enlarging 
the dimenfions, and that the growth is in propor- 
tion to the continuance of light; other circum- 
* flances equal. 
Ve CONCERNING MANURES, 
OR DEAD ORGANIZED MATTER. 
1. What effect have manures in promoting the 
growth of plants, and bringing them to perfection? 
When perfeétly reduced to pure mould, by apply- 
ing to the roots a kind of earth free from all indu- ° 
rations eafily communicative of the aqueous fluid, 
and eafily admitting the extenfion of the delicate 
fibres.—Indurations, I conceive, to be the great evil 
to be guarded againft, with regard to moft pene in 
cultivation. 
Recent manure multiplies infeéts, and poifons the 
roots. I believe much injury is occafioned by inat- 
tention to this circumftance. I have known recent 
manure check vegetation to my vexation. 
2. What are the effects of the different kinds of 
fnanures, of which you have had experience? 
Stable manure, thor oughly rotted, is an addition 
of fine foft loofe earth; vegetable afhes abforb and 
retain moifture. Sand worked into the foil renders 
it lighter and hollower, favourable to tap- -rooted 
vegetables. ee experience goes no farther. 7 
hie 2) Calcareous 
