4 
CHAPTER III. 
. . PAGE* 
Existing aspect of geological or theoretical assumptions to 
mining — On the formation of Coal by drift and 
concretion of marine vegetation ; its place of deposit, 
and the mode of search for it suggested — Variance of 
our Victorian geologists' ideas as to occurrence of 
payable auriferous drifts, with the results of Californian 
and Victorian experience in mining — Encouragement to 
mining on physical principles in search of lost reefs and 
gutters, in old as well as new claims — Description of an 
economical boring apparatus . , , . . . 45 
Concluding remarks . . . . . , . , 53- 
