Sect. IV. Agriculture and Vegetation. 191 



to MalpigbiuS, the fudden contraction fills 

 the fmalleft and remoteft veffels with nou- 

 rifliing juices ; and does it with Ibme force, 

 which may lengthen the vefTels. As the 

 veflels are more full of water, and the per- 

 fpiration lefs than ordinary, it is no wonder 

 that the juices are not well concocted, and 

 the grain bad. 



SECT. IV. 



Of faulty feed. 



HAVING confidered the impediments 

 to vegetation which arife from the 

 ground, let us next take a fhort view of 

 thofe which arife from the feed. To pro- 

 duce ftrong plants, we muft chufe ftrong 

 feed, Grain which has been ftarved in 

 meagre grounds cannot thrive. 



OLD grain will not grow; and there- 

 fore, farmers always chufe the laft year's 

 .corn. It is thought that grain will not 



grow 



