PHYSICAL GEOLOGY. 189 



main agent is moving ice holding boulders in its grasp. The second 

 part of the paper enters into detail as regards the denuding action of 

 rivers, the shape of the river-bed, &c. The author estimated, from the 

 amount of sediment in river-water, that the whole land of the globe 

 was lowered 1 foot in 9000 years ; but by including the amount of 

 siliceous matter pushed along the bed, the time required for denuding 

 1 foot is reduced to 2000 years. In 1872 the author pointed out that 

 the transverse valleys of the Weald run in synclinals ; this point is 

 further dwelt upon. W. T. 



Woodward, Henry. Geologists' Association : Address at the opening 

 of the Session 1874-75. Proc. Geol, Assoc, vol. iv. no. 1, pp. 1- 

 34. 



Deals mainly with Mr. Belt's theory that the cause of the cold of 

 the Glacial Epoch was a change in the obliquity of the Ecliptic. 



See ako : — 

 Brown, Dr. R. Greenland, Ice, &c. : p. 109. 

 Cook, E. T. Glacier Garden of Lucerne (Giants' Pots) : p. 55. 

 Drew, F. The Jummoo and Kashmir Territories : p. 135. 

 Hayden, Dr. F. V. Erosion, E. Colorado : p. 122. 

 Helland, A. Greenland Ejords, &c. : p. 110. 

 Nordenskiold, A. E. Glaciers, ike, : p. 110. 



. (Under Kjelman) : p. 110. 



. Arctic Manual: p. 111. 



