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Stct. VI.] 



GEOLOGY. 



16; 



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J quarry or 



cliff where the land is broken, and o^" 



well, always carrying the bv-is and raa^-es in his mind 





eye to liis imaginary section. In every case this section 

 ought to be laid down on paper, in as nearly as possible 

 the real proportional scale, copious notes should be made, 



and a large suite of specimens collected for his own 

 future examination. The value of sections, with their 

 horizontal and vertical scales true to nature, cannot be 

 exaggerated, and their importance has only lately bef^n 

 appreciated to the full extent. The habit of making 

 even in the rudest manner sectional diagrams is of great 



it often 



importance, and ought never to be omitted : 



shows the observer palpably and before it is too late > a 



grief to which every sea-voyager is particularly liable), 



where his knowledge is defective. Partly for the same 



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reason, and partly from never knowing, when first exa- 

 mining a district, what points will turn out the most 

 important, he ought to acquire the habit of writing very 

 copious notes, not all for publication, but as a ^uide for 

 himself. He on 



'' Reading maketh a full man, conference a ready man, 

 and writing an exact 7nan ;" and no follower of science has 

 greater need of taking precautions to attain ..ccuracy; for 

 the imagination is apt to run riot when dealing with masses 

 of vast dimensions and with time during almost infimty. 



After the observer has made a few traverses of th 





country and drawn his sections (and the coast-c lifts often 

 aftbrd him an invaluabl 



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e one). 



he will be himself asto- 

 nished how, in the most troubled country, over which the 

 surface has been broken up and re-cemented, almost like 



the fragments of ice on a great river, how all the parts 



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