516 
a Klemencic Receiver of Electric Waves,’’ A. D. 
Cole, Ohio State University. 
‘<The Absorption of Beta Rays by Gases,’’ A. 
F. Kovarik, University of Minnesota. (Read by 
title.) 
‘«The Absorption of Gamma Rays of Radium 
by Air at Different Pressures,’’? H. A. Erikson, 
University of Minnesota. 
‘«Poynting’s Tangential Method for showing 
the Existence of Radiation Pressure an Assump- 
tion unwarranted by Experiment,’’ R. A. Wetzel, 
College of the City of New York. 
‘cA New Type of Curve Drawing Instrument 
and Controller Mechanism,’’ M. E. Leeds, Philadel- 
phia, Pa. 
‘¢The Silver Voltameter as a Precision Instru- 
ment,’’? E. B. Rosa, Bureau of Standards. 
‘CRecent Work with the Silver Voltameter,’’ 
G. W. Vinal, Bureau of Standards. 
‘¢The Dielectric Constant, Specific Resistance 
and Electrostatic Absorption of Crystals,’’ H. L. 
Curtis, Bureau of Standards. 
‘¢A New Type of Apparatus for Measuring 
Linear Expansion,’’? Arthur W. Gray, Bureau of 
Standards. 
‘Temperature Influence upon the Refraction of 
Quartz, Boro-silicate Crown Glass, and Dense Flint 
Glass, from 100° C. to — 190° C.,’’ F. A. Molby, 
Cornell University. 
‘¢Thermo E.M.F. of the Nernst Filament,’’ J. 
S. Shearer, Cornell University. 
‘Diffraction Gratings with Controlled Groove 
and Anomalous Distribution of Intensity’’ (illus- 
trated with experiments), R. W. Wood, Johns 
Hopkins University. 
‘¢Purther Investigations with the Radiant Emis- 
sion from the Electric Spark,’’ R. W. Wood, Johns 
Hopkins University. 
‘©A New Type of Neutral Double Potentio- 
meter,’? Walter P. White, Geophysical Laboratory. 
‘¢Note on the Ascensional Rate of the Free 
Balloons used for Meteorological Purposes,’’ 
Wm. R. Blair, Mount Weather Observatory, Blue- 
mont, Va. 
‘A Modified View of the Electron Theory of 
Thermoelectricity,’’ Walter P. White, Geophysical 
Laboratory. 
‘CA Simple Dynamical Example of the Genesis 
of an Integral Equation,’’ A. G. Webster, Clark 
University. 
‘cA New Way to Determine g,’’ A. G. Webster, 
Clark University. 
“On the Effect of Close Electrostatic Coupling 
SCIENCE 
[N.8. Vou. XXXV. No. 900 
on the Free Period of a Lecher System,’’ F. C. 
Blake, Ohio State University. (Read by title.) 
‘<Poynting’s Theorem and the Equation of 
Electromagnetic Action,’’? W. S. Franklin, Lehigh 
University. 
‘©A Simple Slit for the Spectroscope,’’ J. P. 
Naylor, DePauw University. 
‘¢The Applicability of the Planck Equation to 
the Radiation from Tantalum and Tungsten,’’ E. 
P. Hyde, National Electric Lamp Association, 
Cleveland. 
‘«Bvidence that the Velocity of Light is Inde- 
pendent of the Motion of the Source,’’ D. F. 
Comstock, Massachusetts Institute of Technology. 
‘The Specific Heat of Wood,’’ Frederick Dun- 
lap, Department of Agriculture, Washington. 
‘On the Relation between Pressure Displace- 
ment and Wave-length,’’ W. S. Adams and H. G. 
Gale, University of Chicago. 
‘‘The Expansion of Water below 0° C.,’’ J. 
F. Mohler, Dickinson College. 
‘‘The Transmission of the Active Deposit of 
Radium in an Electric Field,’’ E. M. Wellisch, Yale 
University. 
‘¢A New Form of Vacuum Pump,’’ J. Johnston, 
Geophysical Laboratory. 
“(The Emission of Light by Hydrogen Canal 
Rays,’’ G. S. Fulcher, University of Wisconsin. 
‘¢A Sensitive Vacuum Thermal Couple and 
Method for Producing High Vacua,’’ A. H. Pfund, 
Johns Hopkins University. 
‘(On Magnetic Rays,’’ L. T. More and E. G. 
Rieman, University of Cincinnati. (Read by title.) 
‘<The Wave-Lengths of Neon,’’ I. G. Priest, 
Bureau of Standards. 
“(The Electrie Discharge from Pointed Con- 
ductors,’’ John Zeleny, University of Minnesota. 
‘‘Ellipticity and Rotation in Optically Active 
Solutions,’’ L. B. Olmstead, Bureau of Standards. 
‘¢The Language of Meteorology,’’ C. F. Talman, 
Washington. 
‘‘The Joule Thomson Effect in CO.,’’ E. S. 
Burnett, Cornell University. 
‘On the Theory of the Hysteresis Loop of 
Tron,’’ J. Kunz, University of Mlinois. 
‘¢The Photo-electrie Effect in Phosphorescent 
Materials,’’ G. A. Butman, Yale University. 
‘¢ An Absolute Determination of the Coefficient of 
Viseosity of Air,’’ L. Gilchrist, Univ. of Toronto. 
ALFRED D. COLE, 
Secretary of Section B, 
A. A. A. &. 
Oxnto State UNIVERSITY 
