1(1 r'<>LM\ATION AND CROSS-FERTILISATION IX RICK. 



0. 'J'liai as regards certain characters at least, f.//,, oraiii 

 colour, sei^regation along ^tendelian lines appears to take place. 



4. That So lono- as seed of a variety is kept tree from acci- 

 dental mixture there is no risk <^f contamination from cross- 

 fertilisation, but that if seed gets mixed, cross-fertilisation will 

 undoubtedly take place between adjacent plants in a plot and to 

 an extent sutticient in a few years' time to reduce a variety to 

 ,\ number of splitting types. Hence the imperative necessity of 

 takinj;,^ every precaution to keep seed of varieties free from 

 accidental mixtures. 



Dacca, | 



|()/// Jonnary 1913. • 



