182 PHYSICAL GEOLOGY. 



Fry, E. On Moraines as the retaining Walls of Lakes. Hep. Brit. 

 Assoc, for 1875, Sections, p. 64. 



Asks why old terminal moraines are said to act as dams to lakes, 

 ■when those of existing glaciers are all cut through by the streams 

 from the glaciers. P. D. 



Geikie, James. Origin of Lake Basins. Geol. Mag. dec. ii. vol. iii. 



pp. 139, 140. 

 Objects to the logic in Mr. Judd's paper (see p. 183), and to his assump- 

 tion that Eamsay's theory is to be universally applied. 



. Dr. H. Landor on Ground-ice as a Carrier of Stones and 



Debris. Geol. Mag. dec. ii. vol. iii. pp. 459-463. 

 Reprint of a paper published in 1869. 



Greaves, C. On Evaporation and on Percolation. Proc. Inst. Civ. 

 Eng. vol. xlv. pp. 19-47. 



Gives results of experiments on percolation through various artificial 

 soils. The discussion (pp. 48-105) contains many references to geo- 

 logical questions. W. T. 



Green, Prof. A. H. Mr. Judd on Glacial Erosion and Subaerial 

 Denudation. Geol. Mag. dec. ii. vol. iii. pp. 141-143. 



No one supposes that all rock-basins are of glacial origin, or that 

 subterranean forces have had no influence in producing the features 

 of the earth. W. T. 



Greenwood, Col. G. llain and Kivers. Ed. 3. 8vo. London. 



. Glacial Erosion. Geol. Mag. dec. ii. vol. iii. p. 144. 



Postscript to a letter noticed in the Geological Record for 1875, 

 p. 183. 



Gunn, John. On the Influx and Stranding of Icebergs during the 



so-called Glacial Epoch, and a suggestion of the possible cause of 



the Oscillation of the Level of Land and Water to whicli that 



Influx may be due. Bep. Brit. Assoc, for 1875, Sections^ p. 66. 



An influx of icebergs was due to increased area and depth of sea ; 



this would indicate a milder climate, while marks of glaciers would 



indicate cold. Suggests that the alternation may be due to the motion 



of the solar system in space. E. D. 



Gunn, W. Subaerial Denudation versus Glacial Erosion. Geol. Mag. 

 dec. ii. vol. iii. pp. 97-105 ; 2 woodcuts. 



A criticism of Mr. Goodchild's theory. Contends that subaerial 

 denudation is competent to produce the escarpments and scars of the 

 Yorkshire dales. Limestone wears less rapidly under subaerial 

 agencies than is often sujiposcd. W. T. 



Holmes, T. V. Glacial Erosion. Geol. Mag. dec. ii. vol. iii. pp. 189, 



190. 

 Believes that riverg sometimes scoop out basins, and that glaciers 

 may do the same. 



