IV CONTENTS. 



Page 

 XII. Mercury, Liquid and Solid, Under Pressure. By P. VV. 



Bkidgman 345 



XIII. Water, in the Liquid and Five Solid Forms, under Pressure. By 



P. W. Bridgmax '. 439 



XIV. On an Electromagnetic Theory of Gravitation. By D. L. 



Webster 559 



XV. yl Revision of the Atomic Weight of Phosphorus. By G. P. 



Baxter, C. J. Moore and A. C. Boylston 583 



XVI. Polycerella Znobofryon. By W. M. Smallwood .... 607 



XVII. The Anomalous Magnetization of Iron and Steel. By B. O. 



Peirce 631 



XVIII. Pyrosulphuryl Chloride and Chlorsulphonic Acid. By C. R. 



Sanger and E. R. Riegel 671 



XTX. The Fall of a Meteoiite. By E. Thomson 719 



XX. An Algebra of Plane Projective Geometry. By H. B. Phillips 



and C. L. E. Moore 735 



XXI. On Electrical Properties of Crystals. (7.) Stratification and 

 Capacity of Carborundum. By G. W. Pierce and R. D. 

 Evans 791 



XXII. Records of Meetings 825 



Biographical Notices: 



Frederick Irving Knight. By Francis H. Williams . . . 867 

 Thomas Wentworth Higginson. By Andrew MacFarland 



Davis 868 



Officers and Committees for 1912-13 883 



List of Fellows and Foreign Honorary Members .... 885 



Statutes and Standing Votes 899 



Rumford Premium 913 



Index 915 



