ACCESSORY FOOD BODIES 



109 



extracts of green vegetables in the treatment of 

 scurvy. The hypothesis was suggested that special 

 growth substances were formed during germination, 

 which enabled the young embryo to utilize the food 

 material present in the seed. To test this it was 

 decided to remove the source of these growth sub- 

 stances by cutting off the seed as soon as possible 

 after germination, as in that case the addition of 

 food substances would have a much more marked 

 effect. For the experiment two series of wheat 

 seedlings were taken at a rather earlier age than in 

 the previous experiment. Before removal of the 

 seeds both sets weighed 3*97 grammes, and after 

 removal of the seeds 3*2 and 3*17 grammes respect- 

 ively. Both were fed on Detmer's solution, but the 

 second set also received Silver nitrate fraction 

 exactly as before. The results, which in this case 

 were even more striking, were as follow: 



