8o DISEASE IN PLANTS. 



are good types for the conditions afforded, others 

 are bad ones. 



Examples of both will occur in the further 

 exposition of the subject. 



Man's position in regard to the struggle is 

 that of an intelligent being who steps in at certain 

 stages and protects, fosters, and in every way 

 favours the agricultural plant the living machine 

 and sees that every opportunity is given it to 

 do its best work in the best way from his points 

 of view ! 



Notes to Chapter VIII. 



The foundation of any course of reading on hybridisation 

 and selection should be Darwin's Effects of Cross and Self- 

 Fertilisation i?t the Vegetable Kitigdom, which, with his 

 books Oft the Origin of Species by jneans of Natural 

 Selection and The Variation of Afiinials and Plants under 

 Domestication, will prepare the student for the long course 

 of reading necessary for a full appreciation of \\hat has 

 been done in this department of science. 



From the numerous works which followed these I should 

 select Bailey's Survival of the Unlike, London, 1896, and 

 Evolution of our Native Fruits, New York, 1898, as 

 especially useful for the reader of this book, to which may 

 also be added Plattt Breeding, New York, 1896, by the 

 same author, as giving numerous facts and practical direc- 

 tions of value. Further, the " Hybrid Conference Report," 

 Journ. Roy. Hort. Soc, 1900, abounds in facts and informa- 

 tion. Rimpau, La7idiv. Jahrb., vol. xx., 1891, p. 239. The 

 student who wishes to get towards the root of the matter 

 will hardly be able to dispense with Strasburger's Neue 

 Untersuchunge?t fiber die Befruchtungsvorgang bei den 

 Fhanerogameft, Jena, 1884. An interesting summary of 

 recent work on Xenia and " double fertilisation " will be 



