48 



similar to the two original parents were also produced, the 

 two colour-producing factors separating out in these par- 

 ticular descendants. 



Though in a comparatively short space of time great 

 advances have been made in our knowledge of the laws 

 of hybridisation and heredity, miuch remains still to be 

 learnt in this important branch of scientific knowledge 

 and the co-operation of the plant breeder with the scientific 

 investigator is much to be desired. The success alreadv 

 attained in this country is of good augury for the future. 



Further information on some of the subjects discussed 

 in this lecture can be obtained from the following 

 books : — 



Dar^.vin, C. *' Origin of Species/' and ''Animals and ^ Plants 

 under domestication/'' 



De Vries, H. '' Species and Varieties, their Origin by ]^\[utation.'' 

 Chicago, 1905. Also ^' The' Mutation Theory/'' London, loog. 



Bateson, AV. ''•' Alendel's Principles of Heredity/' Cambridge 

 University Press^ iQog. 



Punnett, R. C. " ]\Iendelism/"- Macmillan & Bowes, Cambridge. 

 1Q05, i/-. 



