22 



never had an equal. Darwin's fame will be bound up for all time with the 

 unprejudiced investigation of the question of all questions, the descent of 

 the human race." G. Schwalbe in Darwin and Modern Science. 



1872 Publication of the sixth edition of the Origin. 



Publication of The Expression of the Emotions in Man and Animals. 



1874 Publication of the second edition of The Descent of Man. 



Publication of the second edition of The Structure and Distribution of 

 Coral Reefs. 



1875 Publication of Insectivorous Plants. 



" My book on 'Insectivorous Plants' was published in July 1875 — that 

 is sixteen years after my first observations. The delay in this case, as with 

 all my other books, has been a great advantage to me ; for a man after a 

 long interval can criticise his own work, almost as well as if it were that 

 of another person." 



Publication of the second edition of Variation of Animals and Plants. 



Publication of The Movements and Habits of Climbing Plants as a 

 separate book. 



1876 Wrote Autobiographical Sketch [Life and Letters, Vol. 1. Chap. 11.). 



Publication of The Effects of Cross and Self-fertilisation. 



" It is remarkable that this book, the result of eleven years of experi- 

 mental work, owed its origin to a chance observation. My father had 

 raised two beds of Linaria vulgaris — one set being the offspring of cross- 

 and the other of self-fertilisation. These plants were grown for the sake 

 of some observations on inheritance, and not with any view to cross-breeding, 

 and he was astonished to observe that the offspring of self-fertilisation were 

 clearly less vigorous than the others." Francis Darwin, 1887. 



1877 Publication of The Different Forms of Flowers on Plants of the same 

 species. 



"I do not suppose that I shall publish any more books.... I cannot 

 endure being idle, but heaven knows whether I am capable of any more 

 good work." 



"It may be that eventually many things will be viewed in a different 

 light, but Darwin's investigations will always form the foundation of Floral 

 Biology on which the future may continue to build." K. Goebel in Darwin 

 and Modern Science. 



1879 Publication of his biographical sketch of Erasmus Darwin as an intro- 



duction to E. Krause's Essay, 1882. 



