CONTENTS 
V 
PHYSICS 
PAGE 
On the Pole Effect in the Iron Arc . . .By Charles E. Si. John and Harold D. Bahcock 295 
The Extension of the Spectrum Beyond the Schumann Region 
By Theodore Lyman 368 
The Ruling and Performance of a Ten-Inch Diffraction Grating 
By A. A, Michelson 396 
A Highly Sensitive Electrometer ByA.L. Parson 400 
The Polarized Fluorescence of Ammonium Uranyl Chloride 
By E. L. Nichols and H. L. Howes 4:4^4 
On Thiele's 'Phase' in Band Spectra By Horace Scudder Uhler 487 
The Effect of Pressure" on Polymorphic Transitions of Solids 
By P. W. Bridgman 513 
CHEMISTRY 
PAGE 
A Revision of the Atomic Weight of Cadmium 
By Gregory Paul Baxter and Miner Louis Hartmann 26 
Potassium Ammono Argenate, Barate, Calciate, and Sodate 
By Edward C. Franklin 65 
-Metallic Salts of Ammono Acids By Edward C. Franklin 68 
Ammonobasic Iodides of Aluminium By Edward C. Franklin 70 
A Revision of the Atomic Weight of Lead: The Analysis of Lead Bromide and 
Chloride . .By Gregory Paul Baxter, Fred Leslie Grover and Thorbergur Thorvaldson 71 
A Revision of the Atomic Weight of Praseodymium 
By Gregory Paul Baxter and Olus Jesse Stewart 77 
An Experimental Study of Lipolytic Actions By K. George Falk 136 
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 
On Chondrosamine By P. A. Levene and F. B. La Forge 190 
The Freezing-Point-Solubility Law for Ideal Solutions 
By Edward W. Washburn and John W. Read 191 
Mercury Derivatives of Aromatic Amines. I. Structure of Primary and Sec- 
ondary ^-Amino-Phenylmercuric Compounds 
By Walter A. Jacobs and Michael Heidelberger 195 
Molecular Rearrangements of Triphenylmethane Derivatives. I. General 
Discussion By Julius Stieglitz 196 
Molecular Rearrangements of Triphenylmethane Derivatives. II. Experi- 
mental Part By Julius Stieglitz and Collaborators 202 
The Structure of Complex Atoms and the Changes of Mass and Weight In- 
volved IN Their Formation By William D. Harkins and Ernest D. Wilson 276 
The Osmotic Pressure of the Ions and of the Undissociated Molecules of 
Salts in Aqueous Solution By Stuart J. Bates 363 
The Determination of Surf ace-Tension By T.W. Richards and L. B. Coombs 404 
The Compressibilities of the Elements and their Relations to Other Properties 
By T. W. Richards 411 
The Potentials at the Junctions of Salt Solutions By Duncan A . Maclnnes 526 
The Surface-Tension at the Interface between Two Liquids 
By William D. Harkins and E. C. Humphery 585 
AGRICULTURAL CHEMISTRY 
PAGE 
The Nitrogen Problem in Arid Soils By Chas. B. Lipman 477 
Salts, Soil Colloids, and Soils By L. T. Sharp 563 
