.-. in ACCOl -K III! J II .M 



had lieen concerned in a recent 



i Tht AfaJ. Unless the geological work to be done 

 merely consists in visiting already known ground and 

 making detailed notes, or collecting specimens th< 

 is of the utmost consequence to obtain as good a map of 



t;ion as can be had. Not merely does the observer 

 find the advantage of the topographical guide over tht 

 ground, but, as I shall point out in a succeeding chapter, 

 be cannot, m m.my cases, satisfactorily work out the 

 geological relations of the rocks unless he possesses a 

 map on which to place, in their proper geographical posi- 



he notes he makes at each locality Hence if he 

 cannot procure a map, or if he is at work in a country 

 vet been topographically sun-eyed, he may 

 find himself compelled to make a map for himself with .1 

 near an approach to accuracy as the means at his com- 

 mand will admit This subject is further discussed in 



a. Thf Hammer. This is the chief instrument of the 

 field-geologist He ought at first to use it constantly, 

 and seldom trust himself to name a rock until he has 

 broken a fragment from it, and compared the fresh with 



1 On one occasion, in company with a Survey colleague. 1 

 reached a straggling village in the east . after a travelling 



bow had entered it. The villager* were still Handing at their door*. 

 dfarmiing the character of the new arrival, when we passed them. 

 Of course we were naturally supposed to form a kind of rear-guard 

 f the cavalcade; but we had the saftsfcctton of hearing one old 

 woman remark to her neighbour, as we brushed past them. 

 BOO. arena' thae twa decent-looking chiclds to be play-acting black- 



