a b 

 Frc. 6. 



Tomato plants grown in (a) tomato " sick " soil and {b) some of the same lot of soil 



heated to 200° F. 



"1 



a b 

 Fig. 7. 



Fruit obtained from tomatoes raised on untreated and on treated sick " soils. 

 a. Soil heated to 200 c F. b. Untreated soil. c. Soil heated to 130 0 F. 



r ' - '. 1 



d e f 



Fig. 7 {continued). 



d. Soil treated with toluol. e. Untreated soil. f. Soil treated with carbon 



disulphide. 



