CONTENTS 



Original Papers 



Page 



Physics. — Suggestions for frost protection. Karl F. Kellerman 53 



Geology. — Some variations in Upper Cretaceous stratigraphy. Timothy W. 



Stanton 55 



Geochemistry. — Chalcocite deposition. Arthur C. Spencer 70 



Mineralogy. — Immense bloedite crystals. Waldemar T. Schaller 75 



Physiological Botany. — The formation of leafmold. Frederick V. Coville. . 77 



Abstracts 

 Physical Chemistry 90 



Proceedings 



The Anthropological Society of Washington 91 



The Botanical Society of Washington 92 



