Marcu 29, 1912] 
and influence of the bureau it has been largely 
instrumental in bringing into closer cooperation 
the different national bureaus with a view to 
international agreement as to the fundamental 
questions involved in matters pertaining to 
standards. 
The following seventy research papers were pre- 
sented at the sessions of Wednesday, Friday and 
Saturday, in charge of the officers of the American 
Physical Society. Most of them will be published, 
either in abstract or in full, in the Physical 
Review. 
‘¢An Important Practical Problem in Gyro- 
statie Action,’’ W. S. Franklin, Lehigh University. 
‘CA Relation between the Magnetic Hysteresis 
and the Tensile Strength of a Series of Iron- 
carbon Alloys,’’ C. W. Waggoner, West Virginia 
University. (Read by title.) 
‘¢Relation between the Joule Hffect and the 
Permeability in the Same Specimens of Steel,’’ 
S. R. Williams, Oberlin College. 
‘*A Magnetic Test as a Means of Determining 
Flaws and Mechanical Strains in Iron and Steel,’’ 
Chas. W. Burrows, Bureau of Standards. 
‘<The Electrical Resistance and the Polarization 
E.M.F. of a Mixture of Clay, Feldspar and 
Quartz,’’? A. A. Somerville and O. E. Buckley, 
Cornell University. 
‘© Kinetic Theory of Gravitation; Some Ex- 
planatory Remarks on my Paper of Last Year,’’ 
Charles F. Brush, Cleveland. 
“‘Some Diffraction Photographs,’? Mason E. 
Hufford, Indiana University. 
“(Demonstration of Linear and Surface Ther- 
mopiles of Bismuth and Silver,’’? W. W. Coblentz, 
Bureau of Standards. 
“‘The Vertical Temperature Gradient of the 
Atmosphere,’’ Wm. R. Blair, Mount Weather Ob- 
servatory, Bluemont, Va. 
“CA Modified View of Electronic Conduction,’’ 
Walter P. White, Geophysical Laboratory. 
“‘The Application of Statistical Principles to 
Photoelectric Effects and Some Allied Phenom- 
ena,’? O. W. Richardson, Princeton University. 
(By title.) 
‘“‘The Velocity-distribution Curves of Electrons 
Liberated by Different Sources of Ultra-violet 
Light, and the Bearing of these Curves on the 
Planck-Hinstein Theory,’’? R. A. Millikan, Uni- 
versity of Chicago. 
“*A Study of Crystal Rectifiers,’? R. H. God- 
dard, Clark University. 
“<The Half-value of the Radioactive Deposit Col- 
SCIENCE 
515 
lected in the Open Air,’? F. A. Harvey, Syra- 
cuse University. 
“‘Distribution of Current in Point-Plane Dis- 
charge,’’ Robt. F. Earhart, Ohio State University. 
““The Influence of Temperature on the Phenom- 
ena of Phosphorescence in Zine Sulphide,’’ H. E. 
Ives and M. Luckiesh. 
“On the Free Vibrations of a Lecher System 
using a Lecher Oscillator, II.,’’? F. C. Blake, Ohio 
State University. (Read by title.) 
“‘The Thomson Effect in, and the Thermal Con- 
ductivity of Tungsten, Tantalum and Carbon at 
Glowing Temperatures,’’ A. G. Worthing, National 
Electric Lamp Association, Cleveland. 
“‘The Effect of the Electrical Discharge on 
Solids and Liquids Suspended in Air,’’? W. W. 
Strong, University of Pittsburgh. 
‘A Quantitative Measure of Development in 
Scientific Observation,’’ Otto Stuhlmann, Jr., 
Stevens Institute of Technology, Hoboken, N. J. 
‘‘Hilastie Hysteresis in Metal Bars,’’? A. G. 
Webster and T. L. Porter, Clark University. 
‘<The Spectra of Iron and Titanium at Moderate 
Pressure,’’ H. G. Gale, Chicago University. 
“‘The Spark Spectra of the Alkaline Earths in 
the Schumann Region,’’ Theodore Lyman, Jef- 
ferson Physical Laboratory, Harvard University. 
“‘Demonstration of the Resonance Spectrum of 
Iodine in Vacuo and in Helium,’’? R. W. Wood, 
Johns Hopkins University. 
“C4 Convenient Device for Obtaining a Steady 
High Potential for Electrometer Work,’’ A. H. 
Forman, Cornell University. Introduced by J. S. 
Shearer. 
‘The Form of CO., SO, and NH; Crystals,’’ H. 
E. Behnken. (Introduced by J. S. Shearer.) 
“(A New Method of Photographing Sound 
Waves,’’ A. L. Foley and W. H. Souder, Indiana 
University. 
“‘Another Instrument for Photographing 
Sound,’’ A. G. Webster, Clark University. 
“<The Influence of the Natural Periods of Con- 
centrating Horn and Diaphragm upon Sound 
Wave Records, and the Quantitative Analyses of 
Tones from Several Musical Instruments,’’ D. C. 
Miller, Case School of Applied Sciences. 
‘¢Slit Width Corrections in the Photometry of 
Black Body Spectra,’’? E. P. Hyde, National Elec- 
trie Lamp Association, Cleveland. 
“«The Effect of Temperature on the Absorbed 
Charge in Electric Condensers,’’ Anthony Zeleny, 
University of Minnesota. 
‘<The Influence of Neighboring Conductors upon 
