[ «9 ] 



varieties are (o diftinft, that they Teem to refufe all 

 fort of intermixture with each other in any circum- 

 ftances whatever, and continue invariably to pro- 

 pagate their own kind by feed without any fort of 

 change whatever. This is obvioufly the cafe in all 

 the varieties that are yet known of the pea tribe. 

 Not only do the grey, the white, and the green, con- 

 tinue to produce their like without any variation, 

 although they fhould be reared together in the mod 

 promifcuous manner, but even the lefler varieties 

 of each of thefe forts keep all their diftinguifhing 

 properties without the fmallefl appearance of adul- 

 teration. A fingle charlton pea that grew among a 

 whole field of marrow-fats, if carefully faved, would 

 produce next year a charlton pea of as true a kind as 

 it would have done had it grown perfectly detached 

 from all others ; and the fame thing is obfervable 

 with regard to all the other kinds of garden peafe. 

 In like manner fweet-fcented peafe, which confift 

 of four forts, the white, the purple, the painted 

 lady, and the fcarlet, though fown promifcuoufly, 

 continue each to produce its own kind without any 

 variation. All the kinds of beans poflefs the fame 

 property i as do alfo lupines, kidney-beans, and 

 many other clafTes of plants. Hence it is obvious, 

 that confidered in this point of view, vegetables 

 may b divided into at lead two general clafles. 



One 



