154 



ANNALS OF THE MISSOURI BOTANICAL GARDEN 



[Vol. 6 



TABLE II (continued) 





Cotton 



Cotton t 



Cotton % 



Cotton 



Potato 



5% 

 HCHO 



c 



75 



O 



E 





C 

 O 



G 



*s 



u 



o 



G 



CJ 



u 



cu 



a 



G 



O 



3 c 



'G U 



c3 



G 

 O 



U 



u 



c 

 o 



C 

 O 



U 



G 



c ~o 



4-> 



G 



£ 



"8 



'SI 



cu 



E 



G 

 C 



E 



c 



o3 

 G 



's 



o 



c 



O 



u 



a 



c 





c 

 o 



U 



c 



a> 



u 



a 



c 

 o 



-a 

 c 

 o 



U 



bo 



c 



Ox) 

 O 



0) 

 </3 



4 per cent solution 



15 

 30 



45 

 60 



15 

 30 

 45 



60 



15 

 30 

 45 



60 



15 

 30 

 45 



60 



15 

 30 

 45 

 60 



60 

 60 

 40 



20 



60 

 60 

 40 



80 

 60 

 20 



20 



Normal 



Normal 

 Slightly 



injured 

 Injured 



40 



10 







20 







60 

 50 

 40 



40 

 10 











60 

 50 

 40 







10 

 















100 

 80 

 60 



20 



50 

 40 



20 

 10 



Normal 

 Normal 

 Slightly 

 injured 

 Injured 



Normal 

 Normal 

 Slightly 

 injured 



Injured 



Normal 

 Normal 

 Slightly 



injured 

 Injured 



Normal 

 Normal 

 Injured 

 Injured 



Potato 



Potato t X 



Potato 1 1 



Sunflower 



15 

 30 

 45 

 60 



15 

 30 

 45 

 60 



15 

 30 

 45 

 60 



15 

 30 

 45 

 60 



Bean 



15 

 30 

 45 



60 



100 



90 



100 



60 



90 



20 



40 



10 



100 



90 



100 



40 



80 



10 



40 



10 



Normal 

 Normal 

 Normal 

 Injured 



100 



100 



60 



20 



20 

 

 

 



90 

 90 

 20 







Normal 

 Normal 

 Normal 



Injured 



40 



10 













 

 

 



Normal 

 Normal 

 Normal 



Slightly 



injured 



Injured 





 

 







Normal 

 Injured 

 Badly 

 injured 



f Preliminary treatment 

 X Preliminary treatment 



15 min. 



-soaked in 1% H 2 2 for 10 min. 



soaked in water 18 hrs., then heated to 65° C. for 



io mm. 



II Lint removed with concentrated H2SO4. 

 XX Preliminary treatment — cubes treated with 70% alcohol for 1 

 "|| Preliminary treatment (see text). 



min. 



then dipped momentarily in 70 per cent alcohol, then into a 1 

 per cent H2O2 solution for 10 minutes, and finally into the 4 

 or 5 per cent formaldehyde for 45 minutes. The percentage 

 of germination was low, but after sprouts appeared growth 

 was normal. In a few cases, sterile plants could not be ob- 

 tained, and this was related to the source and kind of potatoes. 



