CONTENTS 
V 
PAGE 
On the Nature of the Heat Production in a System of Platinum Black, 
Alcohol and Air By L. B. Loeb 107 
A Kinematical Interpretation of ElEctromagnetism By Leigh Page 115 
The Laws of Elastico-Viscous Flow, II By A. A. Michelson 122 
Inferences from the Hypothesis of Dual Electric Conduction; the Thom- 
son Effect By Edwin H. Hall 139 
The Functions of Intensity and Phase in the Binaural Location of Pure 
Tones By G. W. Stewart 166 
The Measurement of Small Time Intervals and Some Applications, Prin- 
cipally Ballistic By L. T. E. Thompson, C. N. Hickman, and N. Riffolt 169 
Charcoal Activation By H. H. Sheldon 178 
The Existence of Homogeneous Groups of Large Ions By 0. Blackwood 253 
An Improved Form of High Tension D. C. Apparatus ByD.L. Webster 269 
On the Springfield Rifle and the Leduc Formula 
By Arthur Gordon Webster 289 
On the Connection of the Specific Heats with the Equation of a State 
OF A Gas , By Arthur Gordon Webster 302 
A Photographic Method of Finding the Instantaneous Velocity of Sound 
Waves at Points Near the Source By Arthur L. Foley 310 
Experiments on the Vibration of Air in Conical Horns 
By A.G. Webster 316 
^ On the Nature of the Negative Carriers Produced in Pure Hydrogen and 
Nitrogen by Photo-Electrons By Leonard B. Loeb 435 
Shock or Water Ram in Pipe Lines with Imperfect Reflection at the 
Discharge End and Including the Effects of Friction and Non-Uni- 
form Change of Valve Opening By W. F. Durand 441 
The Vertical Interferometer By A. A. Michelson 473 
On the Application of Interference Methods to Astronomical Measure- 
ments By A. A. Michelson 474 
A Modification of the Revolving Mirror Method for Measuring the 
Velocity of Light By A. A. Michelson 476 
On the K. Series of the X-Rays 
By William Duane and Wilhelm Stenstrom 477 
The Possibilities of the Rocket in Weather Forecasting 
By Robert H. Goddard 493 
Note on a Pneumatic Method of Measuring Variations of the Accelera- 
tion OF Gravity By Carl Barus 495 
T^ryTE ON Torsional Measurement of Variations of the Acceleration of 
Gravity by Interference Methods By Carl Barus 498 
Further Measurements of the Effects of Pressure on Resistance 
By P. W. Bridgman 505 
Characteristic Absorption of X-Rays: L Series 
By William Duane and R. A. Patterson 509 
On the Relative Positions and Intensities of Lines in X-Ray Spectra 
By William Duane and R. A. Patterson 518 
On a Differential Equation Occurring in Page's Theory of Electro- 
magnetism By H. Bateman 528 
On a Condition for Helmholtz's Equation Similar to Lame's 
By Arthur Gordon Webster 605 
The Absorption of X-Rays by Chemical Elements of High Atomic Numbers 
By William Dtiane, Hugo Fricke and WilhcIm S'enstroin 607 
