QL 



EARTH 

 SCIENCES 



TO 

 THOSE OF MY FELLOW-COUNTRYMEN, 



AMONG THE WORKING CLASSES, 

 WHO WISELY EMPLOY THEIR LEISURE HOURS 



IN THE 

 PURSUIT OF USEFUL AND ELEVATING KNOWLEDGE, 



WITH THE 



HOPE THAT OTHERS, AMONG THEIR RANKS, 

 MAY BE INDUCED TO 



FORSAKE THE PATHS OF PROFITLESS AND DEGRADING 

 DISSIPATION, 



i)t$ Volume 



IS, WITH EVERY GOOD WISH, 



SDetitcatelJ 



BY THE AUTHOR. 



