CONTENTS. 



Page. 



I. Types of Abnormal Color Vision. By Louis Bell 1 



II. Laboulbeniales Parasitic on Chrysomelidae. By Roland Thaxter 15 



III. The Demagnetizing Factors of Cylindrical Rods in High, Uniform 



Fields. By B. Osgood Peirce 51 



IV. On Electric Conduction and Thermoelectric Action in Metals. By 



Edwin H. Hall 65 



V. On the Theory of the Rectilinear Oscillator. By Edwin B. Wilson. 105 



VI. Planck's Radiation Formula and the Classical Electrodynamics. 



By David L. Webster 129 



VII. The Influence of the Magnetic Characteristics of the Iron Core of an 

 Induction Coil upon the Manner of Establishment of a Steady 

 Current in the Primary Circuit. By B. Osgood Peirce . . . 147 



VIII. A Revision of the Atomic Weight of Praseodymium. The Analysis 

 of Praseodymium Chloride. By G. P. Baxter and O. J. 

 Stewart 169 



IX. Geometry whose Element of Arc is a Linear Differential Form, 

 with Application to the Study of Minimum Developables. By 

 C. L. E. Moore 197 



X. Synopsis of the Chinese Species of Pyrus. By Alfred Rehder . 223 



XI. Certain Old Chinese Notes. By Andrew McF. Davis .... 243 



XII. A Critical Discussion of the Crystal Forms of Calcite. By 



H. P. Whitlock 287 



XIII. Records of Meetings ... - 353 



Officers and Committees for 1915-16 387 



List of Fellows and Foreign Honorary Members 389 



Statutes and Standing Votes 405 



Rumford Premium 419 



Index 421 



