[Proc RX.F.C, 



SUMMER SESSION. 



The following Excursions were made during t/ie Summer Session : 



On Saturday, 17 th May, to 



DUNGANNON AND COALISLAND. 



The Tyrone coal-field has been the subject of many elaborate 

 reports, forming no small share of the scientific literature of the 

 North of Ireland. Sir Richard Griffith, in his capacity as mining 

 engineer to the Royal Dublin Society, was the first to deal with 

 the subject in a proper manner. Sir Robert Kane, too, enlarged 

 on the same theme ; and Col. Portlock, of the Royal Engineers, 

 when conducting the geological branch of the Ordnance Survey of 

 Ireland, gave a summary of all that was then known, and added 

 the result of his own observations and inquiries in his report of the 

 geology of Londonderry, &c. Since then occasional papers have 

 been published by others interested in the matter ; but the most 

 valuable of all other publications must be the memoir in course of 

 publication by the Government Geological Surveyors, under the 

 direction of Professor Hull, F.R.S. Indeed, Professor Hull has 

 already given his opinion regarding the nature and extent of the 

 field in his report to the Commissioners appointed in 1870 to as- 

 certain the probable duration of British coal-fields; and E. T. 



