TABLE OF CONTENTS. 



ARTICLE I. Introduction. Pp. 16. 



Advertisement ......... 



List of Officers of the Smithsonian Institution ..... 



Table of Contents ........ 



ARTICLE II. On The Relative Intensity op the Heat and Light of the Sun upon Dif- 

 ferent Latitudes of the Earth. By L. W. Meech. Pp. 58, and six plates. 



ARTICLE III. Illustrations of Surface Geology. By Edward Hitchcock, LL. D., Profes- 

 sor of Geology and Natural Theology in Amherst College. Pp. 164, and twelve 

 plates. 



Part I. On Surface Geology, especially that of the Connecticut Valley, in New 

 England. 



Introductory Remarks ..... 

 Terraces and Beaches ..... 



1. Sections of Terraces and Beaches on the Connecticut River 



2. Surface Geology in Europe .... 



3. Terraced Island in the East India Archipelago 

 Other forms of Surface Geology .... 

 Results or Conclusions from the Facts 



Origin of the Drift ..... 



Tables of Heights of River Terraces and Ancient Beaches 



1 



5 

 14 

 34 

 43 

 44 

 49 

 72 

 76 



Part II. On the Erosions of the Earth's Surface, especially by Rivers. 



General Remarks . . . . » . . .81 



Agents of Erosion ........ 82 



Conjoined Results of these Agencies . . . . . ,85 



Detail of Facts ......... 94 



