CONTENTS 



Original Papers 



Page 



Physical Chemistry. — The statement of acidity and alkalinity, with special 



reference to soils. Edgar T. Wherry 305 



Botany. — Intolerance of maize to self-fertilization. G. N. Colwns 309 



2kx>logy. — Recent zoological explorations in the western Arctic. Rudolph 



Martin Anderson 312 



Abstracts 



Geology. . .' 315 



Ornithology 321 



Entomology 327 



Paleontology 328 



Mycology , 328 



SciENTiPic Notes and News 330 



