LECTIJEE VI. 



A CRITICAL EXAMINATION OP THE POSI- 

 TION OP MR. DARWIN'S WORK, "ON 

 THE ORIGIN OP SPECIES," IN RELATION 

 TO THE COMPLETE THEORY OF THE 

 CAUSES OP THE PHENOMENA OP OR- 

 GANIC NATURE. 



In the preceding five lectures I have endeavoured to 

 give you an account of those facts, and of those reason- 

 ings from facts, which form the data upon which all 

 theories regarding the causes of the phenomena of 

 organic nature must be based. And, although I have 

 had frequent occasion to quote Mr. Darwin — as all 

 persons hereafter, in speaking upon these siibjects, will 

 have occasion to quote his famous book on the " Origin 

 of Species,"' — you must yet remember that, wherever I 

 have quoted him, it has not been upon theoretical 

 points, or for statements in any way connected v/ith liis 

 particular speculations, but on matters of fact, brought 

 forward by himself, or collected by himself, and which 

 appear incidentally in his book. If a man loUl make a 

 book, professing to discuss a single question, an ency- 

 cloptedia, I cannot help it. 



Now, having had an opportunity of considering in 

 this sort of Avay the different statemeuls bearing upon 



a 



