ON PHOTOGRAPHS OF GEOLOGICAL INTEREST. 283 



Regd. No. 



922 Howth .... Cambrian quartzite (showing bedding) 



923, 924 Sutton Shore, Howth . Glacial drift 



925 „ „ . Drift on ice-truncated edges of Cambrian 



slates 



926 „ „ . Carboniferous limestone partly altered into 



dolomite 



Co. Fermanagh. 



Photographed by R. Welch, 49 Lonsdale Street, Belfast. 

 Size 8x6 inches. 



958 Enniskillen . . . The ' Marble Arch' 



Co. Galway. 



Photographed by H. L. P. Lowe, Shirenewton Hall, Chepstow. 



Size 6x4 inches. 



a77 Pass of Salruch, Little Erosion of river valley 

 Killery River, Conne- 

 mara 



The Circidation of TJndercjround Waters. — Twentieth Report of the 

 Committee, consisting of Dr. E. Hull {Chairman), Sir Douglas 

 Galton, Messrs. J.* Glaisher, Percy Kendall, Professor G. A. 

 Lebour, Messrs. E. B. Marten, G. H. Morton, Professor Prest- 

 wiCH, Messrs. I. Roberts, Thos. S. Stooke, G. J. Symons, 

 W. ToPLEY. C. Tylden-Wright, E. Wethered, W. Whitaker, 

 and C. E. de Eance (Secretary). {Braivn up by C. E. de Rance.) 



The reporter has made good progress with the digest of the previous 

 nineteen reports, which will be ready for publication this year, giving the 

 details grouped in geological formations and counties. 



The reporter, through unavoidable circumstances, is unable to be 

 present this year, and is anxious to point out that not only has the Car- 

 diff Naturalists' Society sent a valuable contribution, but several other 

 societies federated to the British Association intend to furnish informa- 

 tion ; this being the case, he ventures to point out that it appears 

 desirable to continue the work of your Committee, and that it is evident 

 that if the work entrusted to them in 1874 be terminated in 1894 it 

 will be continued by the federated societies, but the details of sections 

 and analyses will be scattered over many publications and will not be 

 of general use and access to engineers and sanitai-ians, and the results 

 obtained will be published under various modes and conditions not 

 admitting of common reference, as is the case in the reports emanating 

 from your Committee. 



The Committee would therefore venture to suggest that, as valuable 

 information can still be obtained through the agency of local societies, they 

 be reappointed without grant. 



Your Committee have to deplore the death of one of their original 

 members, Mr. Wm. Pengelly, F.K.S., who contributed most valuable infor- 

 mation in the early days of the investigation, and throughout has taken 

 an active interest in the work. 



