8o POPULAR LECTURES AND ADDRESSES. 



brought " forward not a shadow of evidence " in 

 support of that assertion, I cannot complain that 

 he puts a heavy burden on me. No moderately 

 well read or well instructed student of modern 

 British popular geology wants evidence from me, 

 in addition to that supplied by his reminiscences 

 of books and lectures, that the admission of such 

 a limit as even worthy of attention, is a sweeping 

 reform. Here, however, is some of it, if desired. 

 [The italics are mine in each case.] 



6. " So l that, in all probability, a far longer 

 "period than 300 million years has elapsed since 

 " tin latter part of the secondary period'' 



7. " Again, 2 where the FORCE seems unequal 

 " to the result, the student should never lose sight 

 "of the element TIME: an clement to which we 

 " can set no bounds in tJie past, any more than we 

 " know of its limit in the future. 



" It will be seen from this hasty indication that 

 " there are two great schools of geological 

 "causation the one ascribing every result to the 



1 Darwin's Origin nf Species, Edition 1859, paye 287. 



- Ailvaticcii Text Book of Geology t 1859, page 338. 



