4 GEOLOGY OF THE LOTHIANS. 



ments, the author begs leave to mention, that, though the 

 phenomena may have been few which he considered worthy 

 of minute description, this did not (if there was to be 

 an attempt at a geological map of the Lothians) in any 

 way lessen the labour. The country required to be tra- 

 versed in all directions in search of appearances worthy of 

 description, and if many excursions were made without the 

 author finding any thing to describe, or even a rock of 

 which a specimen was requisite, still there was the same ex- 

 penditure of time and labour as would have taken place if 

 these excursions had been fraught with interest. 



As the Lothians have been traversed in all directions by 

 geologists, little novelty is to be expected in the following 

 pages; yet the author, by verifying and correcting from 

 actual examination all previous accounts, and by adding 

 his own observations, trusts that he will meet the wishes of 

 the Wernerian Natural History Society. From accom- 

 panying Professor Jameson in his excursions, he has derived 

 much information, and has endeavoured to conduct his re- 

 searches on the principles so ably taught by that experi- 

 enced and celebrated geologist. 



The speculative parts of the essay, and the views in re- 

 gard to some points in the geology of the Lothians, bear 

 on printed statements, and on others which, although not 

 printed, are well known to the geologists of Edinburgh. 



The maps accompanying this essay have been coloured, 

 as far as possible, in accordance with Professor Jameson's 

 paper " On the colouring of Geological Maps," which is 

 published in the first volume of the Wernerian Transac- 

 tions ; all the tints, however, have been made more intense, 



