88 POPULAR LECTURES AND ADDRESSES. 



" enquire whether that limitation is justified by 

 " the arguments employed in its support." [The 

 italics are mine.] This method of treating my 

 (( case " is perfectly fair, according to the judicial pre- 

 cedents upon which Professor Huxley professedly 

 founds his pleading. I make no comment or reply, 

 but simply ask permission to put in the following 

 evidence [the italics again are mine] : " He who 

 " can read Sir Charles Lycll's grand work on the 

 " Principles of Geology, which the future historian 

 " will recognise as having produced a revolution in 

 " natural science, yet does not admit how incom- 

 " preJiensibly vast have been the past periods of 

 r time, may at once close tJiis volume? (Darwin's 

 Origin of Species by means of Natural Selection.) 1 



13. In the discussion in this Society which 

 followed my lecture on " Geological Time," the 

 necessity for much longer periods in geological 

 history than 100 million years was very strongly 

 urged on biological grounds. I answered that 

 Geologists, by estimates of very great numbers 

 of millions of years, had misled biologists into 



1 Edition 1859 ; page 282. 



