CONTENTS 
Page 
Astronomy.— An Attempt to Measure the Free Electricity in the Sim's At- 
mosphere . . . . .By George E. Hale and Harold D. Babcock 123 
Astronomy.— Results of an Investigation of the Flash Spectrum Without an 
Eclipse By Walter S. Adams and Cora G. Burwell 127 
Astronomy. — Variability of Spectrum Lines in the Iron Arc .... 
By C. E. St. John and H. D. Babcock 131 
Chemistry.— An Experimental Study OF Lipolytic Actions . By K. George Folk 136 
Chemistry. — ^The Hydration of the Ions of Cesium Chloride Derived from 
Transference Experiments in the Presence of Raffinose 
By Edward W. Washburn and Earl B. Millard 142 
Geology. — The Origin of Coral Reefs . . . . By W. M. Davis 146 
Botany. — ^A Method of Prophesying the Life Duration of Seeds 
By William Crocker and J. F. Groves 152 
Zoology. — The Fertilizing Power of Sperm Dilutions of Arbacia . 
By Frank R. Lillie 156 
Bacteriology.— Variation in Bacteria . . . .By Edwin 0. Jordan 160 
Physiology. — ^A Dynamic Conception of the Organic Individual, By C. M. Child 164 
Mathematics. — ^A Note on Functions of Lines . . By Gilbert Ames Bliss 173 
Mathematics. — ^A Classification of Quadratic Vector Functions 
By Frank L. Hitchcock 177 
Astronomy. — On the Radial Velocities of Five Nebulae in the Magellanic 
Clouds By Ralph E. Wilson 183 
Notices of Scientific Memoirs 184 
