CONTENTS. 
Page 
introduction. . . . , . 
1 
Chapter I. — Resume of a Geological Reconnaissance extending from Napoleon, at the junction of the Arkansas 
with the Mississippi, to the Pueblo de los Angeles in California ...... 9 
Chapter II. — Geological notes of a Survey of the country comprised between Preston, Red River, and 
El Paso , Rio Grande del Norte. 26 
Chapter III. — Paleontology 22 
Chapter IV. — Geology of New Mexico 54 
Chapter V. On the Geology of the United States and the British Provinces of North America .58 
Chapter VI. — Sketch of a Geological classification of the Mountains of a part of North America ... 71 
Chapter Vn. — On the Gold of California ......... 81 
Chapter VIII. Construction of the Geological Map of the United States and British Provinces - Criticisms 
of the American Journal of Science and Arts, conducted by Professor B. Silliman , B. Silliman Jr., 
and James D. Dana 25 
Chapter IX. — A Synopsis of the History of the Progress and Discoveries of Geology in North America . 99 
lihapter X. — List of Maps and Memoirs on the Geology of North America 1-22 
