386 Notices respecting New Books. 



the west side of the Eocky Mountains and Cordilleras confluent 

 glaciers were another centre for the formation and dispersion of 

 " drift." . The glacial deposits of North America, numerous, 

 extensive, and thick, overlapping one another, reach southwards 

 to the coast of New York and New Jersey, and over-ride the 

 States that lie north of the Ohio and Missouri. 



The till, drumlins, escars, kames, sand-plains, glacio-fluvial 

 moraine-aprons with their valley-drifts and sheets of silt or loess, 

 partly due to ice and water and partly to wind, are definitely 

 handled. 



One of the classifications of the great North-American drift- 

 sjries suggested by Prof. Chamberlin is as follows : — 



(\. Concealed deposits (theoretical). 

 2. Kansan stage of glaciation : First, Glacial Epoch. 

 o. First Interglacial Epoch. 

 Glacial i t. East-Iowan Stage: Second Glacial Epoch. 

 Period. ' 5. Second Interglacial Epoch. 



6. East- Wisconsin Stage: Third Glacial Epoch, perhaps com- 

 prising a Fourth Epoch. 

 ^ 7. Later oscillations. 



Professor Geikie thinks that this arrangement is closely parallel 

 with the glacial history which he has described for this part of our 

 hemisphere. Pie regards the Kansan stage as equivalent to his 

 own " Second Glacial Epoch," with the maximum glaciation, and 

 specially applicable to the Lower Diluvium of Central Europe. 

 The East-Iowan matches his Third epoch ; and he finds 

 corresponding features in Europe for the East- Wisconsin, and 

 even for the possible fourth epoch entertained by Prof. Chamberlin 

 (p. 775). 



In the Appendix, pages 817-826 give a well digested account 

 of the published evidences of the results of glacial action at 

 various geological periods, in many parts of the world. Indeed 

 it is pointed out that proofs, more or less distinct, occur in all, or 

 nearly all, the geological formations, of contemporary glacial 

 boulders or glaciated surfaces. The Appendix contains also an 

 account of Loch Lomond and its map (PL XVI.) ; and remarks 

 on the maps, Pis. L, IX., X., XL, XIII., XIV., and XV., showing 

 the directions of glaciation in the British Isles, Europe, Asia, and 

 North America. Notes on the map, PI. XII., showing the 

 distribution of land and sea in Northern Europe after the last 

 great Baltic glacier come also in this Appendix, p. 832. Eight 

 other maps and charts are given in the volume ; and 78 woodcuts 

 of views, sections, rocks, and illustrative diagrams are scattered 

 through the text. 



A General Index and one of Authors are useful adjuncts to 

 this elaborate history of the " Great Ice Age." 



