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3d. Sfortingy or thofe which always produce va- 

 rieties from feeds without any known or apparent 

 caufe; as the potatoe, and many other plants. 



There are probably other clafTes of plants that 

 have not yet been obferved or thought of. 



It was to be obferved, however, that though the 

 variety of forts was very great, yet the parent breed 

 feems to have /o;;/.? influence on the progeny j as 

 there were a greater number that in feme fort re- 

 fembled the parent flock than could be found of 

 any other individual fort. 



I fhall not take up the time of the Society, by 

 making many remarks on this experiment. It Is 

 enough that the fa6t be afcertained. Varieties may 

 be obvioufly obtained from feeds; and fome of thefe 

 varieties may be found that fhall pofTefs valuable 

 qualities that have not yet been found united in any 

 fingle fort, though it is probable that for one truly- 

 valuable fort, many may be found which will not 

 be nearly fo well worth cultivating as thofe we al- 

 ready poflefs. Thefe confiderations, while it ought 

 to induce thofe who have good opportunities for 

 doing it, thus to raife new varieties each year, 

 fhould alfo induce them to be particularly attentive 

 to afccrtain the qualities of each fort refpedlively, 



with 



