i88o.] 'POWER OF MOVEMENT IN PLANTS.' 505 



completion, he wrote to Prof. Cams (July 17, 1879), Wlth re- 

 spect to a translation : — 



" Together with my son Francis, I am preparing a rather 

 large volume on the general movements of Plants, and I think 

 that we have made out a good many new points and views. 



" I fear that our views will meet a good deal of opposition 

 in Germany ; but we have been working very hard for some 

 years at the subject. 



" I shall be much pleased if you think the book worth 

 translating, and proof-sheets shall be sent you, whenever they 

 are ready." 



In the autumn he was hard at work on the manuscript, 

 and wrote to Dr. Gray (October 24, 1879) : — 



" I have written a rather big book — more is the pity — on 

 the movements of plants, and I am now just beginning to go 

 over the MS. for the second time, which is a horrid bore." 



Only the concluding part of the next letter refers to the 

 ' Power of Movements ' :] 



C. Darwin to A. De Candolle. 



May 28, 1880. 

 My dear Sir, — I am particularly obliged to you for hav- 

 ing so kindly sent me your ' Phytographie ;' * for if I had 

 merely seen it advertised, I should not have supposed that it 

 could have concerned me. As it is, I have read with very 

 great interest about a quarter, but will not delay longer 

 thanking you. All that you say seems to me very clear and 

 convincing, and as in all your writings I find a large number 

 of philosophical remarks new to me, and no doubt shall find 

 many more. They have recalled many a puzzle through 

 which I passed when monographing the Cirripedia ; and your 

 book in those days would have been quite invaluable to me. 

 It has pleased me to find that I have always followed your 



* A book on the methods of botanical research, more especially of sys- 

 tematic work. 

 <6 



