—. 
[ 286 J 
11, Whatare the effetis of dung and other manures, 
upon the tates favour, and whalfomene/s of vegetables? 
If the dung be completely rotten, the effeds will 
be quicknels of growth, fucculence, crifpnefs, and 
delicacy of flavour. Thus cucumbers in .a, frame 
sare, in theie refpects, fuperior, to. thofe grown.on 
open beds; and thus the produétions of well-manured 
gardens are fuperior to thofe raifed in poor Jand and 
bleak fituations. .», Medical herbs-raifed in the latter 
fituations will be preferable to thofe on better 
ground, becaufe a flow growth is fayourable to the 
degree of their medical virtue, 
UL ftrongly fufpeé that the application of ill-digefted 
manure to land, is an evil productive of very great 
injury. Worms and grubs are.multiplied thereby— 
the moft noxious vapours are propagated——and, pro- 
bably, the difeafes in our grain crops may originate 
inthis circumftance. I cannot believe that the deli- 
cate fibres of a root, making an.effort to penetrate 
aclod of putrifying dung, can efcape uninjured. 
And vegetable. difeafes, I prefume, often commence 
at the root. 
VI. CONCERNING CULTURE. 
“Fe What effects bas the culture of the earth on the 
growth of plants, and bringing them. to perfection ? 
By frequent motion the internal parts are brought 
into ufe, the contexture is diffolved, and the whole 
mafs fo comminuted as to favour the growth of the 
root, and fupply it with moifture. 2. Is 
