!•§ Proceedings of the British Assoc tatio7i for [Sept. 



The Sections were as formerly, six in number. 



A. Mathematics and Physics. 



Subsection A. Mechanical Arts. This subdivision was 

 formed in consequence of the press of matter in the depart- 

 ment of General Physics. 



B. Chemistry and Mineralogy. 



C. Geology and Geography. 



D. Zoology and Botany. 



E. Anatomy and Medicine. 



F. Statistics. 



Geology and Geography — Monday, lOth August.* President, 

 Mr. Griffith. Vice-Presidents, Mr. Murchison ; Pro- 

 fessor Sedgwick. Secretaries, Captain Portlock ; 

 Mr. ToRRiE. 

 1. The Chairman exhibited a Geological Map of Ireland, 

 the construction of which had occupied his attention for 

 many years ; and, although there might be some errors in 

 matters of detail, he believed that it was generally correct, 

 and afforded a faithful outline of the physical structure of 

 Ireland. 



One remarkable peculiarity in the physical structure of 

 Ireland is, that while the waters are almost every where 

 fringed with ranges of primary mountains, the interior of 

 the country is level, or slightly undulated, and hence the 

 course of most of the Irish rivers ; in fact, the Shannon 

 affording the only exception to this remark. 



Another remarkable circumstance in the physical history 

 of Ireland, is the frequent occurrence of long ranges of 

 granite hills, often attaining the height of twenty or thirty 

 miles, and running parallel to each other. In ancient times 

 roads were constructed on the tops of these natural mounds. 

 The usual course of these ridges is E. &: W., but occasion- 

 sionally they are N. & S. 



These heaps of granite give an undulatory aspect to the 



* To Professor Powell of Oxford, and Dr. Scouler of Dublin, the Editor is 

 almost solely indebted for the reports of the proceedings of the Geological and 

 Physical Sections. He is himself responsible for the details relating to that of 

 Chemistry ; and for the other reports he is obliged to Mr. King of Dublin and 

 to other sources. 



