PKEFACE. Vli 



of a Geological Survey, working among the more limited, the more 

 thoroughly investigated, and therefore, the better known formations, with 

 which European Geologists are familiar. 



I confidently hope that it will be possible during the ensuing season to 

 unite this Central Indian work, with the districts already investigated in 

 Bengal. The disturbed state of the country has prevented the accom- 

 plishment of this during the last few years. But the connexion between 

 the two once established, many questions of great geological interest, 

 now undecided, will receive a solution. 



Thomas Oldham. 

 March, I860. 



