Dr. Croll's Theory of Glacial and Warm Periods. 1 1 1 



them to whole continents, that it is possible to maintain 

 hypotheses so little supported by evidence. 



It follows, therefore, from a general survey of the position, 

 that neither on meteorological, geological, nor palaeonto- 

 logical grounds can Dr. Croll's theory be maintained, and 

 that the evidence is conclusively opposed to the glacial 

 theory as presented by him, and is especially against the 

 notion that such a glacial period has been a recurring 

 event in geological history. 



