FIELD GEOLOGY. 



simpler applications, the chances of confusion or mis- 

 apprehension are greatly lessened at the same time 

 suggestive hints are inserted, which indicate, rather than 

 describe, the more detailed and complicated operations 

 and calculations. 



Additional notes are given on the more common 

 Minerals, Metals and their Ores their mode of occur- 

 rence, and the methods adopted for their discovery and 

 utilisation. Also on the Rocks which do not follow the 

 general laws of stratification and arrangement, requiring 

 therefore a somewhat different method of ascertaining 

 and shewing their extent and their relations these are 

 the eruptive and intrusive rocks and the glacial deposits. 

 A short sketch is added of the practical application of 

 geological surveying, in the important question of water- 

 supply from deep-seated springs. 



