CONTENTS 



Original Papers Page 



Radiotelegraphy. — Radio signal fading phenomena. J. H. Delunger and L. E. 

 Whittemore 245 



Abstracts 



• 



Geology and Hydrology 259 



Botany "260 



Entomology 261 



Analytical Chemistry 261 



Proceedings 



Biological Society 262 



Scientific Notes and News 264 



OFFICERS OF THE ACADEMY 



President: Alfred H. Brooks, Geological Survey. 

 Corresponding Secretary: Robert B. Sosman, Geophysical Laboratory. 

 Recording Secretary: William R. Maxon, National Museum. 

 Treasurer: R. L. Faris, Coast and Geodetic Survey. 



NOTE 



The May and June numbers of the Journal have been delayed on account of strikes in 

 the printing trades. 



