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The National Geographic Magazine 



is known — little though that knowledge 

 is — of the mysterious forces writhing 

 under the earth's crust. The coal strike 

 in the United States has aroused an in- 

 terest of a different character — an in- 

 quiry as to what coal is and how it hap- 

 pens to be stored in certain localities 

 and not in others as well. The pro- 

 longed and successful agitation for irri- 

 gation in the West and for forest reser- 

 vations has also had its share in arousing 

 the public to other questions relating to 

 physical geography, as, for instance, 

 weathering and soils, forests and rain- 

 fall. 



Therefore a book about Physical 

 Geography, written in a simple and in- 

 teresting manner and not loaded down 

 with innumerable technical terms which 

 are of value to the specialist but not to 

 the general public, is especially wel- 

 come. Such a volume has recently been 

 written by Messrs G. K. Gilbert and 

 A. P. Brigham, and published by Messrs 

 D. Appleton & Co., of New York. 

 The authors modestly call the work 

 "An Introduction to Physical Geogra- 

 phy." It is planned especially as a 

 text-book for schools and has already 

 gained much success. A second edi- 



From Gilbert's and Brigham's " Introduction to Physical Geography." D. Appleton & Co. 



Figure No. i — Watkins Glen ; a Gorge Carved from Beds of Shale 



