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162 



GEOLOGY, 



[Sect. VI. 



they were procured being known, it is highly necessary 

 that every specimen should be ticketed on the same day 

 wheii collected. If this be not done, in after years the col- 

 lector will never feel an absolute certainty that his tickets 

 and references are correct. It is very troublesome tick- 

 eting every separate fossil from the same stratum, yet it 

 is particularly desirable that this should be done ; for 

 when the species are subsequently compared by natu- 

 ralists, mistakes are extremely liable to occur ; and it 

 should always be borne in mind, that misplaced fo3;:rils 

 are far w^orse than none at all. Pill-boxes are \ory 

 useful for packing fossils. Masses of clay or any soft 

 rock may be brought 



abundant in them. Rock-specimens should be about two 

 or three inches square, and half an inch thick; they 

 should be folded up in paper. To save subsequent 

 trouble, it will be found convenient to pack up and mark 

 outside, sets of specimens from different localities. These 



details may appear trifling ; but few are aware of the 



home, if small fossil shells are 



labour of opening and arranging a large collection, and 

 such have seldom been brought home without some errors 

 and confusion having crept in. 



To a person not familiar with geological inquiry, on 

 first landing on a new coast, probably the simplest way 

 of setting to work, is for him to imagine a great trench 

 cut across the country in a straight line, and that he has 

 to describe the position (that is, the angle of the dip and 

 direction) and nature of the different strata or masses of 

 rock on either side. As, however, he has not this trench 

 or section, he must observe the dip and nature of the rocks 

 on the surface, and take advantage of every river-bank or 



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