THE 



SCIENTIFIC PROCEEDINGS 



OF THE 



EOTAL DUBLIN SOCIETY. 



I.— ON SOME EEFECTS PEODTJCED BY LANDSLIPS AND 

 MOVEMENTS OE THE SOIL-CAP, AND THEIR RE- 

 SEMBLANCE TO PHENOMENA WHICH ARE GENE- 

 RALLY ATTRIBUTED TO OTHER AGENCIES. Br 

 PROFESSOR y. BALL, M.A., E.R.S., F.G.S., Hon. Sec, 

 Royal Geological Society of Ireland. (Plate I.) 



[Eead, November 20, 1882.] 



IN the year 1878 I published^ a preliminary, and, of necessity, 

 imperfect sketch of what, from the evidence then available, 

 I believed to be the mode of origin of the series of lakes which 

 occur at Naini Tal and its neighbourhood, in the North-west 

 Himalayas. 



The probable glacial origin of these unique Himalayan lakes 

 had previously been suggested by Mr. H. F. Blanford ; " but the 

 tentative hypothesis put forward in my Paper was, that they were 

 not true rock-basins, but were simply portions of river-eroded 

 valleys, which had been more or less dammed up by the fall of 

 debris from the slopes of the surrounding hills. So the matter 

 was left, but not for very long, as, in 1880 my late colleague, 

 Mr. Wm. Theobald,^ having visited the lakes, pronounced them 

 to be glacial. 



^ Records of the Geological Survey of India, vol. xi., p. 174. 

 2 Proceedings, Asiatic Society of Bengal, January, 1877, p. 3. 

 '""' Records of the Geological Survey of India, vol. xiii., p. 161. 



SCIEN. PROC, K.D.S. — VOL. IV. FT. I. B 



