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-who, with paring and dragging inftruments, drew 

 out many loads in the courfe of the day. Thefe, 

 laid on a ridge, about fifty yards on the bank of the 

 ftream, were continued there about three weeks; 

 when I had two cart-loads of this aquatic fubftance 

 laid on two different parts of an inclofed piece of 

 land preparing for turnips, in an equal proportion 

 with ftye and (table manure, fpread at the fame 

 time over the remainder of the field: with another 

 load I filled up a hollow that had been lately exca- 

 vated, on which I planted turnip-rooted and favoy 

 cabbages ; and at the fame time planted fome of 

 both in a common garden foil, and likewife in fome 

 unmixed mud, where no weeds grew, drawn from 

 the river for that purpofe. 



The virtue of the weed-compoft is obvious in 

 each experiment; in the laft-mentioned, the favoys 

 exceeded in cabbage, and the turnip-rooted in leaf 

 and bulb, others of the fame fpecies fet in garden 

 mould; while thofe fet on the mere mud have 

 fcarcely made a progrefs; decifively evincing, I 

 conceive, that the principle of increafe, and progrefs 

 of vegetation, are more peculiarly derived from the 

 weeds, than from the matrice on which they grew. 



In refpedt to the turnips, though no partiality 



was (hewn in fpreading more in quantity, in equal 



. ( (paces, 



