CONTENTS 



PAGE 



Introduction i 



Geological Explorations in the Canadian Rockies i 



Paleontological Field-Work in the United States 22 



Astrophysical Field-Work in Arizona and in Chile 30 



Botanical Expedition to the Orient ^^ 



Biological Exploration in the Dominican Republic 44 



Experiments in Heredity 47 



Entomological Expedition to Alaska 52 



Archeological Field-\\'ork on the Mesa Verde National Park 64 



Archeological Collecting in the Dominican Republic 83 



Archeological Reconnaissance of the Cahokia and Related Mound Groups. 92 



Archeological Investigations at Pueblo Bonito, New Mexico 106 



Archeological Field-Work in South Dakota and Missouri 117 



Field-Work on the Kiowa, Pueblo, and California Indians 125 



Archeological Field-Work on the Susquehanna River, Pennsylvania 127 



