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 cur knowledge of the laws 
of hybridisation and heredity, much 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 already 
attained in this country is of good augury for the future. 
Further information on some of the subjects discussed 
oe = lecture can be obtained from the followifig 
Si— 
Darwin, C. “ Origin of Species,” and “Animals and Plants 
under domestication.” 
De Vries, H. “ Species and Varieties, their Origin by Mutation.” 
Chicago, 1905. Also “ The Mutation Theory,” London, 1909. 
Bateson, W. “Mendel’s Principles of Heredity,’ Cambridge 
University Press, 1900. 
Punnett, R. C. “ Mendelism,” Macmillan & Bowes, Cambridge, 
1905, I/-. 
