CONTENTS 



Original Papers 



Page 



Meteorology. — ^Violent uprushes in cumulous clouds. W. J. Humphreys... 93 



Physics. — ^The high frequency resistances of inductances. L. W. Austin. . . 94 



Mineralogy. -^The calculation of mineral formulas. Waldemar T. Schaller. 97 

 Botany. — Chaetospermum, a new genus of hard-shelled citrous fruits. Walter 



T. Swingle 99 



Botany. — Chelonocarpus, a new section of the genus Annona. W. E. Safford . 103 



Abstracts 



Astrophysics 110 



Meteorology 110 



Terrestrial Magnetism 112 



Physics 113 



Geochemistry 114 



Petrography 115 



Petrology 116 



Geology 116 



Botany 119 



Plant Physiology 119 



Proceedings 



Thp Washington Academy of Sciences 121 



The Anthropological Society of Washington 128 



The Chemical Society of Washington • 129 



The Botanical Society of Washington 132 



