496 



SCIENCE 



[N. S. Vol. LI. No. 1324 



Plural births in man: Charles B. Davenport. 

 Dynamical aspects of injury, recovery and death : 



W. J. V. OSTERHODT. 



Tlie importance of the presence of both sympa- 

 thetic superior cervical ganglia to the maintenance 

 of life; and their possible relations to respiratory 

 diseases: Samuel J. Meltzer. 



The National Sesearch Council: James E. 

 Angell. 



A psychological study of the medical officers in 

 the Army: Eobert M. Yekkes. 



Afternoon Session 



Spectroscopic phenomena of very long vacuum 

 tubes: Robert W. Wood. 



The measurement of small time intervals and 

 some applications, principally ballistic (introduced 

 by Arthur G. Weibster) : L. T. E. Thompson, C. N. 

 Hickman and N. Eiffolt. 



The effect of molecular structure upon the reflec- 

 tion of molecules from the surface of liquids and 

 solids: Eobert A. Millikan. 



The Springfield rifle and the Leduc formula: 

 Arthur G. Webster. 



On the internal ballistics of the Springfield rifle : 

 Arthur G. Webster. 



The 100-inch Hooker telescope of th-e Mt. Wilson 

 Observatory : George E. Hale. 



The vertical interferometer : Preliminary tests in 

 an attempt to measure the diameter of the stars; 

 A modification of the Foucault method adapted to 

 long-distance measurement of the velocity of light: 



A. A. MiCHELSON. 



Preliminary measurements on the pressures in 

 the "Onde de Choc": Arthur G. Webster. 



On the specific heat of powder gases : Arthur G. 

 Webster. 



Thermal conductivity of metals: Edwin H. Hall. 



Evening Session 

 TJie scale of the universe: Harlow Shaplet, 

 Mounit Wilson Solar Observatory, and Heber D. 

 Curtis, Lick Observatory (open to tie public). 

 TJ. 8. Naitional Museum (main auditorium). (Wil- 

 liam Ellery Hale Lectures.) 



TUESDAY, APRIL 27 



Morning Session 



Distribution and villages of the Indian tribes of 

 the Klamath Biver region, California: C. Hart 

 Merriam. 



Significance of correlation in function between 

 the dentition and skeleton of the Sabre-tooth tiger: 

 John C. Merriam. 



On the colonial nervous system of Eenilla: 

 George H. Parker. 



The genus Botrychium and its relationships: 

 Douglas H. Campbell. 



The influence of cold in stimulating the growth 

 of plants: Frederick V. Coville. 



Som^ common foods as sources of vitamines: 

 Thomas B. Osborne and Lafayette B. Mendel. 



The physico-chemical properties of hcemoglobim: 

 Lawrence J. Henderson. 



The direct combinaticm of nitrogen and chlorine : 

 William A. Noyes. 



Valance and chemical affinity : Gilbert N. Lewis. 



Afternoon Session 



Shock of water ram in pipe lines with imperfect 

 reflection at the discharge end and including the 

 effect of friction and non-uniform change of valve 

 opening: William F. Durand. 



Recent notable progress in the theory of num- 

 bers: Leonard E. Dickson. 



Geodesies and relativity: Edward KIasner. 



The use of alternating currents for submarine 

 cable transmission (introduced by G. O. Squier) : 

 F. E. Pernot. 



Improvements in telegraphy : George O. Squiek. 



The air resistance of spheres: Lyman J. Briggs. 



The possibilities of the rocket in weather fore- 

 casting: Egbert H. Goddard. 



The distribution of land and water on the earth : 

 H. Fielding Eeid. 



The alterations of limestones in contaet-meta- 

 morphism: Waldemab Lindgren. 



Structure of Marrella and allied middle Cambrian 

 crustaceans : Charles D. Walcott. 



On a single numerical index of the age distribu- 

 tion of a population (by title) : Eatmond Pearl. 



Biographical memoir of George Jarvis Brush 

 (by title) : Edward S. Dana. 



SCIENCE 



A Weekly Journal devoted to the Advancement of 

 Science, publishing the official notices and pro- 

 ceedings of the American Association for 

 die Advancement of Science 



Published every Friday by 



THE SQENCE PRESS 



LANCASTER. PA. GARRISON. N. Y» 



NEW YOraC. N. Y. 



Entered m the po>t-«£c« at Laocutn. Pft.» u ■econd cIsm maXum 



