2o8 
POPULAR SCIENCE REVIEW. 
object has been to direct special attention to what might be 
called the discipline or principles which should guide the student 
of chemical geology in his researches, so as to render him, if 
possible, an independent and unbiassed investigator, free from 
the little prejudices which are sure to cling to those votaries of 
the older schools who find it diflScult to keep pace with the 
rapid strides of more modern and exact science. 
