The Conclufion. ^6^ 
fxop in September^ they rarely thrive well, 
unlefs in a cool moift fummer, by reafon of 
the too great perfpiration caufed by the fum- 
mer’s heat, which drys and hardens their 
fibres before they are full grown. 
Tho* we have from thefe Experiments,' 
and from common obfervation, many proofs 
of the great expanfive force, with which the 
fibrous roots of plants fhoot, yet the lefs 
refiftance thefe tender fhoots meet with, the 
greater progrefs they will certainly make in 
equal times : And therefore one conlidera- 
ble ufc of fallowing and trenching ground, 
and of mixing therewith feveral forts of com. 
poft, as Chalk, Lime, Marie, Mold, 
is not only thereby to replenifli it with rich 
manure, but alfo to loofen and mellow the 
foil, not only that the air may the more 
eafily penetrate to the roots, but alfo that 
the roots may the more readily make vigo- 
rous fhoots. And the greater proportion the 
furface of the roots bears to the furface of 
the plants above ground, fo much the greater 
quantity of nourifhment they will afford^ 
and confequently the plants will be the more 
vigorous, and better able to weather it out, 
againft unkindly feafons, than thofe plants 
whofe 
