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Page 

 Tlie Rivers and Valleys of Pennsylvania : William Morris Davis . 183 

 (Illustrated by one map and twenty -five cuts.) 



Topographic Models : Cosmos Mindeleff 254 



(Illustrated by two plates.) 



National Geographic Society — Abstract of Minutes . . . 269 



International Literary Contest to be held at Madrid, Spain . 273 



July, 1889. 



PRESS OF TUTTLE, MOREHOUSE 4 TAYLOR, NEW HAVEN, CONN. 



