t ^'33 ] 



with the mod rigorous and cautions attention, fo as 

 not to allow themfclves to be impofed on cither by 

 prejudice or prepoflcfTions of any fort; for it is thus 

 alone that ufeful forts can be really obtained. 



By attending to the facls above dated, it will alfo 

 appear, that, in order to make a proper difcrinnina- 

 tion, the produce of each individual feedling plant 

 ought to be cultivated entirely by itfelf, till its qua- 

 lities be fully afcertainedj and that none of the 

 others be mixed with it, however much they may 

 refemblc it in appearance ; as the qualities of thefe 

 may be very different. 



It would feem to me probable, that gentlemen, 

 "who have hitherto been in the practice of rearing 

 feedling potatoes, have not been fo flridtly atten- 

 tive to this lad rule as fcems to be necefTary, and it 

 is probably owing to this circumftance that we 

 fometimes meet with particular (lems of potatoes in 

 a field, which, although refembling others in ap- 

 pearance, are extremely different from them in re- 

 fped of prolificacy, and fome other lefs obvious, 

 though as important qualities. From this circum- 

 ftance too, may have arifcn many variations in the 

 refulc of particular experiments on the culture of 

 this plant, which feem to be altogether irrecon- 

 cileable to each other. 



K 3 Since 



