CONTRIBUTIONS FROM THE W1SLEY LABORATORY. 



603 



Table IV., showing the Characters of Tubers obtained from Bad Plants. 



II 



H I 



1 



2 

 3 



4^ 



5 

 6 



7 



8 



9 

 10 

 1 1 

 12 

 13 

 14/ 



15 

 16 

 17 



iS 



19 



20 



21 



22 

 23 

 24 

 25 

 26 



Weight in 

 grammes 



Number 

 of eyes 



1 



Eyes 

 shallow 

 or deep 



19 



6 



t s Is ! 



20 



7 



tmlra 



II 



6 



t m 1 m 







t m 1 m 





6 



t m 1 m 



all less than 35 

 grammes each 



6 

 6 



1 1 



9 



Q 

 0 



7 



6 



t m 1 s 

 tmlm 



t 111 1 111 

 tmlm 



tmlm 

 t s Is 





7 



tmlm 





8 



t m 1 ni 



52 



8 



t s 1 m 



23 



9 



tmlm 



9 



7 



tmlm 





5 



tmlm 





7 



ts Is 





5 



tmlm 



36 



8 



tmlm 



24 



8 



tmlm 



18 



6 



ts Is 



20 



8 



t s Is 



20 



6 



tmlm 



14 



7 



t m 1 s 



Grouping 

 of sprouts 



Sprouts 

 injured 

 or not 



Number 

 of sprouts 

 removed 



Situation j 

 of sprout 

 left 



Skin 

 smooth 

 or rough | 



Skin 

 injured 

 or not 



Texture of 

 the tuber | 





— 



... 



... 



r 



— 



m 





— 



... 



... 



r 



— 



m 





— 



... 



... 



r 



— 



m 



t si ... 



4. 

 1 



O 



t 



sm 



T 



f 



t si 1 si 



+ 



3 



t 



sm 



+ 



f 



t si ... 



— 



0 



t 



sm 



+ 



m 



tgrlsi 



— 



2 



t 



sm 



+ 



so 



tsi ... 



— 



0 



t 



sm 



+ 



m 



t si ... 





0 



t 



r 



+ 



m 



t si ... 





0 



t 



sm 





m 



t si 1 si 





0 



t 



sm 



+ 



so 







— 



— 



— 



r 



+ 



m 







— 



— 



— 



r 



+ 



so 





— 



— 



— 



r 



+ 



so 



t gr ... 



+ 



2 



t 



m 



+ 



m 



t si ... 



+ 



0 



t 



sm 



+ 



m 



t si ... 





0 



t 



sm 





in 



t si ... 



+ 



0 



t 



m 



+ 



MO 



tsi ... 



+ 



0 



t 



m 



+ 



SO 



tsi ... 



+ 



0 



t 



sm 





SO 



t si 1 si 



+ 



1 



t 



m 





m 



tsi ... 



+ 



0 



t 



m 



+ 



m 



tsi ... 





0 



t 



m 





m 



tsi ... 





0 



t 



r 



+ 



m 



tsi ... 



+ 



0 



t 



m 



+ 



m 



tsi ... 



+ 



0 



t 



m 



+ 



so 



d = deep f = firm gr = groups 1 - lateral m = medium r = rough 

 s = shallow si = single sm = smooth so = soft t — terminal 

 4- =5 injured — = not injured. 

 Numbers printed in heavy type indicate that the tubers in question produced 

 bad plants. 



All these tubers, with a single exception (Table IV. 22), produced 

 bad plants, as at Chelsea in 1911. The exceptional plant had been 

 growing in a different situation, having been placed on the floor of 

 the greenhouse in partial shade under moister conditions. 



F. — Relation between Bad Plants and Tuber Characters. 

 Experiments to ascertain whether the occurrence of bad plants is 

 in any way correlated with tuber characters : 



(a) Planting soft or flabby tubers — sent from Dunbar. 

 The tubers referred to in section B of this Report and scheduled 

 in Table I. c were, with the exception of tuber 76. planted in a row 

 apart from the main plot, in 1912, with the following result : 

 Tuber 70 Table I. medium blotched foliage. 

 71 soft 

 73 ft medium ,, 



„ 74 » >> soft 

 „ 75 ,, „ soft green 



