172 



SCIENCE 



[N. S. Vol. LI. No. 1311 



spectrum, including X-rays," "by E. A. Millikan, 

 D. L. Webster, Wm. Duane and A. W. Hull. 



The programs consisted of thirty-four papers, six 

 of which were read by title only, presented at four 

 different sessions. The program of eight papers 

 given at the session of Wednesday morning, con- 

 sisted exclusively of papers relating to acoustics. 

 The average attendance was about eighty-five, the 

 maximum being about one hundred and twenty- 

 five. The program was as follows: 



Variation of transparency to total radiation with 

 temperature of source: S. Lerot Brown. 



The dissipation of heat hy various surfaces in still 

 air: T. S. Taylor. 



The influence of air velocity and the angle of inci- 

 dence on th-e dissipation of heat: T. S. Taylor. 



The measurement of thermal expansion of metals 

 at ordinary temperatures: Charles D. Hodg- 



MAN. 



A metJwd for determining the photographic ab- 

 sorption of lenses: G. W. Mopfitt. 



Defects in centered quadric lenses: Irwin Eoman. 



The sinTcer method applied to the rapid and accu- 

 rate determination of specific gravities: N. W. 

 Cdmmings. (Read by title.) 



Amplification of currents in the Bunsen flame: C. 

 W. Heaps. 



A new type of non-inductive resistance: H. L. 

 Dodge. 



Some laboratory uses for the contract rectifier: -T. 

 C. Jensen. 



An undamped wave method of determining dielec- 

 tric constants of liquids: W. H. Hyslop and A. 

 P. Carman. (Eead toy title.) 



Difficulties in the theory of rain formation: W. J. 

 Humphreys. 



A physical theory of ocean or reservoir tempera- 

 ture distributions, regarded as effects of solar 

 radiation, evaporation and the resulting convec- 

 tion: Geo. F. McEwen. 



'Electromagnetic induction and relative motion: W. 



r. G. SWANN. 



The influence of blowing pressure on pitch of or- 

 gan pipes: Arthur C. Lunn. 

 A photographic study of explosions in gases: John 



B. DUTCHEE. 



A photographic study of sound pulses through 

 erooTced and curved tubes, with deductions con- 

 cerning telephone mouthpieces, phonograph 

 horns, etc. : Arthur L. Foley. 



A photographic method of measuring the instan- 

 taneous velocity of sound waves at points near 

 the source: Arthur L. Foley. 



A possible standard of sound — J., study of opera- 

 ting conditions; II., study of wave form: Chas. 

 T. Knipp. 



The performance of conical horns : G. W. Stewart. 



A photographic study of tlie wave-form of sounds 

 from large guns in action: Dayton C. Miller. 



The calibration of a sound chamber and sound 

 sources and the measurement of sound transmis- 

 sion of simple partitions: Paul E. Sabine. 



Transmissions of sound through walls: F. E. 

 Watson. 



Charcoal absorption and cyclic changes: Thos. E. 

 Doubt. 



The heat of vaporization and loorlc of ionization : C. 

 S. Fazel. (Eead by title.) 



Energy content of characteristic radiations: 

 Chester W. Rice. 



The spectrum of radium emanation: R. E. Nt- 

 swander, S. C. Lind and E. B. Moore. 



The Zeeman effect for electric furnace spectra: 

 Arthur ,S. King. (Eead by title.) 



Critical potentials of the "L" series of platinum: 

 David L. Webster. 



On the possibility of pulling electrons from metals 

 by powerful electric fields: E. A. Millikan and 

 B. E. Shackelpord. 



On the recoil of Alpha particles from light atom^: 

 L. B. LOEB. (Eead by title.) 



Beaetive hydrogen in the electrical discharge: 

 Gerald L. Wendt and Robert S. Landauer. 

 (Read by title.) 



The construction an-d design of a device permitting 

 the application of a ciurrent pulse for a prede- 

 terminate number of milliseconds: Lyndley 

 Pyle. 



The spectral transmission of various glasses: 

 Henry P. Gage. 



Dayton C. Miller, 



Secretary 



SCIENCE 



A Weekly Journal devoted to the Advancement of 

 Science, publishing the official notices and pro- 

 ceedings of the American Association for 

 the Advancement of Science 



Published every Friday by 



THE SaENCE PRESS 



LANCASTER, PA. GARRISON, N. Yo 



NEW YORK, N. Y. 



Entered in the post-affico at LAocaiter. Pa., ai leoond clats matteit 



