570 



SCIENCE 



[N. S. Vol. XLVII. No. 1223 



"An experimental investigation of the cliarac- 

 teristic X-ray emission from molyidenum and pal- 

 ladium," by Benjamin A. Wooten, Columbia Uni- 

 versity. 



"Characteristic X-ray emission as a function of 

 the applied voltage," by Bergen Davis, Columbia 

 University. 



"A standard of sound" (demonstration), by 

 Chas. T. Knipp, University of Illinois. 



"The air damped vibrating system: theoretical 

 calibration of the condenser transmitter," by I. B. 

 Crandall, American Telegraph and Telephone Com- 

 pany and The Western Electric Company. 



"A photographic method of measuring the ve- 

 locity of sound waves near the source of sound," 

 by Arthur L. Foley, Indiana University. 



"The effect of intensity and distance on the ve- 

 locity of sound," by Arthur L. Foley, Indiana 

 University. 



"The influence of the pressure and time em- 

 ployed in condensing a dental amalgam upon its 

 crushing strength, at temperatures between 10° and 

 100° C," by Arthur W. Gray and Paris T. Car- 

 lisle, The L. D. Caulk Company. 



"Absorption in paraffined paper condensers," by 

 L. Pyle, Washington University, St. Louis. 



"An interesting case of resonance in an alter- 

 nating current circuit, " by H. L. Dodge, The State 

 University of Iowa. 



"On electromagnetic induction and relative mo- 

 tion II., " by S. J. Barnett, Ohio State University. 



"Eddy-current and hysteresis losses in iron at 

 high frequencies," by C. Nusbaum, Harvard Uni- 

 versity. 



"Some energy transformations with oscillatory 

 currents," by E. F. Northrup, Princeton Univer- 

 sity. 



"The effects produced upon audion characteris- 

 tic curves by different Mnds of signals {Buzzer 

 Electron Selay and 60-cycle A. C.)," by A. D. 

 Cole, Ohio State University. 



"Influence of a series sparTc on the direct current 

 corona," by S. F. Crocker, University of Illinois. 



"On the effect of a magnetic field upon cathode 

 rays," by L. T. More and LoweU M. Alexander, 

 University of Cincinnati. 



"The physical characteristics of X-ray fluores- 

 cent intensifying screens, ' ' by Millard B. Hodgson, 

 Eastman Kodak Company. 



"Barometric ripples," by W. J. Humphreys, U. 

 S. Weather Bureau, Washington, D. C. 



"The ultra-violet and visible absorption spectra 

 of phenolphtlialeins," by W. E. Howe and K. S. 

 Gibson, Cornell University. 



"The ultra-violet and visible absorption spectra 

 of Orcinolphthaleins," by B. C. Gibbs, H. E. Howe 

 and E. P. T. Tyndall, Cornell University. 



"The ultra-violet absorption spectra of acetone," 

 by E. P. T. Tyndall, Cornell University. 



' ' Thermal conductivity of metals, ' ' by Edwin H. 

 Hall, Harvard University. 



"A mercury manometer of high sensibility," by 

 J. E. Shrader, Westinghouse Kesearch Laboratory, 

 Pittsburgh. 



"A simple gauge for very low pressures," by 

 J. E. Shrader, Westinghouse Eesearch Laboratory, 

 Pittsburgh. 



" Sesonance and ionizing potentials for electrons 

 in magnesium vapor," by P. D. Foote and F. L. 

 Mohler, Bureau of Standards. 



' ' The spectral photoelectric sensitivity of molyb- 

 denite," by W. W. Coblentz and W. B. Long, Bu- 

 reau of Standards. 



The papers by Messrs. Siebel, Foley, Crooker, 

 More, Alexander and Coblentz were read by title. 



On Saturday morning, December 29, at 10 a.m. 

 the subject of discussion was ' ' The relationship of 

 physics to war." Addresses were made by Lieu- 

 tenant G. P. Thomson, E.F.C., and by Lieutenant 

 Giorgio Abetti, member of the Italian Military 

 Mission. Informal reports upon the war activities 

 of various laboratories were made by the follow- 



Dr. A. L. Day, director of the Geophysical Labora- 

 tory. 

 Dr. I. B. Crandall, Eesearch Laboratory of the 



Western Electric Company. 

 Dr. Frank Wenner, Bureau of Standards. 

 Mr. C. E. Skinner, Eesearch Laboratory of the 



Westinghouse Manufacturing Company. 

 Dr. W. J. Humphreys, U. S. Weather Bureau. 



The Sectional Committee announced tne ap- 

 pointment of Professor C. T. Knipp, of the Uni- 

 versity of Illinois, to fill the vacancy on the sec- 

 tional committee made by the withdrawal of G. W. 

 Stewart. 



The Section elected by ballot the following named 

 persons : 



For member of the Council: Professor Wm. 

 Duane, of Harvard University. 



For member of the Sectional Committee : Dr. H. 

 D. Arnold, of the Eesearch Laboratory of the West- 

 ern Electric Company. 



For member of tlie General Committee : Dr. H. S. 

 Hower, Carnegie Institute of Technology. 



G. W. STEVfAST, 



Secretary 



