F. KiDD AND C. West 



161 



Table III. 

 Brassica alba. 



Lot I consisted of 10 immature seeds. 



Lot II consisted of 10 bare embryos from similar seeds. 



Set on damp sand. 



* The remaining 8 ungerminated seeds finally died, 

 t Healthy plants. 



Pisum sativum. 



. ^ Lot I consisted of 20 immature seeds. 



yLot II „ 20 bare embryos from similar seeds. 



■g (Lot I 

 iLot II 



p ^Lotl 

 \Lot II 



20 less immature seeds. 



20 bare embryos from similar seeds. 



20 seeds picked 10 days later. 



20 bare embryos from similar seeds. 



Duggar {I.e. pp. 387-8) states that "so far as ability to grow is con- 

 cerned, no very narrow restrictions may be placed upon the stage of 

 development of the seed, provided adequate and suitable nourishment 

 can be given the young embryo. In a series of experiments recently 

 carried out by the writer, whereby the young embryos were transferred 

 from the developing seeds to sterile nutrient solutions, the results 

 confirm the view that embryos thus treated are able to maintain them- 

 selves and sometimes able to develop mature plants." 



