122 



Darwin, and after Darwin. 



On the whole, then, as regards Brown-Se"quard's 

 experiments, it will be seen that I have not been 

 able to furnish any approach to a full corro bo ration. 

 But I must repeat that my own experiments have 

 not as yet been sufficiently numerous to justify 

 me in repudiating those of his statements which 

 I have not been able to verify. 



The only other experimental results, where animals 

 are concerned, which seemed to tell on the side of 

 Lamarckianism, are those of Mr. Cunningham, already 

 alluded to. But, as the research is still in progress, 

 the school of Weismann may fairly say that it would 

 be premature to discuss its theoretical bearings. 



Passing now from experiments on animals to 

 experiments on plants, I must again ask it to be 

 borne in mind, that here also no researches have 

 been published, which have had for their object the 

 testing of the question on which we are engaged. 

 As in the case of animals, therefore, so in that of 

 plants, we are dependent for any experimental results 

 bearing upon the subject to such as have been gained 

 incidentally during the course of investigations in 

 quite other directions. 



Allusion has already been made, in my previous 

 essay, to De Vries' observations on the chromatophores 

 of algae passing from the ovum of the mother to 

 the daughter organism; and we have seen that 

 even Weismann admits, " It appears possible that 

 a transmission of somatogenetic variation has here 

 occurred 1 ." It will now be my object to show that 

 such variations appear to be sometimes transmitted 



1 Examination of Weismannism, p. 83. 



