] 



CONTENTvS 



Original Papers 



Page 



Mathematics.— Note on rotations in hyperspace. Edwin BidwELL Wilson . . 25 



Chemistry. — Note on the Bucher cyanide process for the fixation of nitrogen. 



EuGEN Posnjak and H. E. Merwin 28 



Physical Chemistry. — Some physical constants of mustard "gas." Leason H. 



Adams and Erskine D. Williamson 30 



Botany.— A peculiar species of Lasiacis. A. S. Hitchcock 35 



Technology. — The determinateness of the hysteresis of indicating instruments. 



F. J. Schlink ^. 38 



Abstracts 



Physics 46 



Inorganic Chemistry .> 46 



Physical Chemistry 47 



Geology 4^ 



Mammalogy 50 



Ornithology 5 ^ 



Vital Statistics 53 



Proceedings 



Washington Academy of Sciences 54 



Biological Society '. 54 



Scientific Notes and News 56 



