C 217 ) 
Mfidijlurhed the while. And when the Earth has yielded 
up all them, thofe that are proper for Barly, a different 
Grainy remain Jii/I behind ^ 'till the fucceffive Crops of 
that Corn fetch them forth too. And fo the Oats, and 
Peafe^ in their Ti?^r;z ; 'till in fine all is carried offy and 
the Earth in great Meafure drained of ^c^r/ of M<^/- 
ter. 
After all which, ^/6^^ 'very Tra5i of L^;?^/ may be 
brought to produce another Series of the fame Vegetables : 
but never 'till 'tis fupplied with a new of Matter^ 
of like ySr/ with that it at firft contained. This fupply 
is made feveral ways. By the Grounds fallow for 
fome time, 'till the i2^/« has poured down'a y/<?r)5 
upon it. Or by the Tiller's Care in xVIanuiing of it. 
And for further Evidence that this fupply is in reality of 
like forty we need only refledl a while upon thofe Ma-- 
nures that are found by conftant Experience beft to pro- 
mote Vegetation y and the fruitfulnefs of the Earth. 
Thefe are chiefly either Parts of VegetableSy or oi Ani^ 
mals 'y which indeed either derive their own Nourip?nent 
immediately from Vegetable Bodies, or from other Ani- 
mals that do fo. In particular, the Blood, UrinCy and 
Excrements of Animals : Shavings of Horns and of 
Hoofs : Hairy Wool, Feathers : calcin'd Shells : Lees of 
Winey and of Beer : Afkes of all forts of Vegetable Bo-- 
dies: Leaves y Straw, Roots, and Stubble y turn'd into 
the Earth by Plowing or otherwife, to rot and diffolve 
there ; thefe I fay are our beft Manures, and, being 
Vegetable Subfiances, when refunded back again into the 
Earthy ferve for the formation of other like Bodies. 
Not wholly to Confine our Thoughts to the Fields y 
let us )ook a while into our Gardens ; where we fhall 
meet with ftill further Confirmations of the fame thing. 
The Trees, Shrubs, and Herbs Cultivated in thefe, after 
they have continued in one Station till they have derived 
I i thence 
