452 



Experiments upon the Potatoe, 



16. Knight's No. 20 



17 Knight's No. 



1 Tuber 

 1 Eye 



3 



lEye 



3 Eyes 

 Parings 



1 Tuber 



3 Eyes 

 Parings 



1 Tuber 

 lEye 



Parings 



21. IA Dunmore's Kidney 1 Tuber 



62.17 8 " 

 11.54 15 May 3 Ju 



Now if we omit Nos. 4, 13, 15, 16, the growth of which seems 

 to have been accidentally interfered with by some unknown cause, 

 and No. 17 the tuber of which did not grow, we shall find that 

 the rate of produce is in 13 cases in 16, in favour of the single 

 eyes as compared with tubers ; in 9 cases in 16 in favour of single 

 eyes as compared with sets containing three eyes ; and in 10 cases 

 in 16, in favour of single eyes as compared with parings ; or, if we 

 consider the results of the whole sixteen experiments as being but 

 one experiment, we shall find their proportions expressed by the 

 following figures. 



Whole Tubers . 338.38 



Single Eyes . . 717.87 



Three Eyes . . 613.94 



Parings . . 504.69 



