492 



SCIENCE 



[N. S. Vol. XL VI. No. 1194 



THE PHILADELPHIA MEETING OF THE 

 NATIONAL ACADEMY OF SCIENCES 



The autumn meeting will be held at Philadel- 

 phia, November 20 and 21, in the engineering 

 building of the 'University of Pennsylvania. On 

 Tuesday evening a reception for the members of 

 the academy and invited guests wiU be given by 

 Provost and Mrs. Smith at the University Mu- 

 seum at 9 o'clock. The academy dinner vfill take 

 place at the Bellevue-Stratford on Wednesday even- 

 ing at 7.30 o'clock. 



The scientific sessions are as follows: 



Tuesday, Novemier SO, 10.S0-1S.30 

 The wheat problem of the United States, Erwin 

 P. Smith, Bureau of Plant Industry, U. S. Depart- 

 ment of Agriculture. 



The modern systematist, Liberty H. Bailey, Cor- 

 nell University. 



A criticism of the evidence for the mutation 

 theory of De Vries from the behavior of (Enothera 

 in crosses and in selfed lines (by invitation), Brad- 

 ley M. Davis, University of Pennsylvania. 



The chemical mechanism of regeneration, Jac- 

 ques Loeb, Rockefeller Institute. 



A comparison of growth changes in the nervous 

 system of the rat with the corresponding changes 

 in man, Henry H. Donaldson, the Wistar Institute. 

 Hereditary tendency to form nerve tumors, 

 Charles B. Davenport, Station for Experimental 

 Evolution, Carnegie Institution. 



Pood hormones or vitamines in some animal tis- 

 sues (to be presented by L. B. Mendel), Lafayette 

 B. Mendel and Thomas B. Osborne, Yale Univer- 

 sity. 



Tuesday Afternoon, S.00-4.00 

 The atomic weight of boron, Edgar F. Smith 

 and Walter K. VanHaagen, University of Penn- 

 sylvania. 



The effect of intravenous injection of magnesium 

 sulphate upon tetanus — with a lantern slide dem- 

 onstration by J. Auer (by invitation), Samuel J. 

 Meltzer and John Auer. 



Chemotherapy of spirochetal infections, for Drs. 

 Jacobs and Brown, Simon Plexner, Eockefeller In- 

 stitute. 



Possible action of the sei-determining mechan- 

 ism (by invitation), Clarence E. McClung, Univer- 

 sity of Pennsylvania. 



The cause of mosaics and gynandromorphs in 

 Drosopliila, Thomas H. Morgan, Columbia Univer- 

 sity. 



Spectrum analysis by different persistence of 

 vision (by invitation), Herbert E. Ives, Physical 

 Laboratory, The United Gas Improvement Com- 

 pany. 



Wednesday, November SI, 9.S0-10.S0 



The atmosphere and terrestrial radiation, Charles 

 G. Abbot, Smithsonian Astrophysical Observatory. 



Geometric aspects of the theory of heat, Edward 

 Kasner, Columbia University. 



Invariants which are functions of parameters of 

 the transformation (by invitation), Oliver E. 

 Glenn, University of Pennsylvania. 



The validity of the thermoelectric equation 

 P = T(dv/dT}, Edwin H. HaU, Harvard Univer- 

 sity. 



A thermoelectric diagram on the P. V. plane, Ed- 

 win H. Hall, Harvard University. 



The Astrapotheria of the Patagonian Miocene, 

 William B. Scott, Princeton University. 



Evolution of the Titanotheres : Pinal conclu- 

 sions, Henry F. Osborn, American Museum of Nat- 

 ural History. 



Study of the motions of forty-eight double stars 

 (by invitation), Eric Doolittle, University of Penn- 

 sylvania. 



A determination of the solar motion and of 

 stream motion based on absolute magnitudes (read 

 by Professor Hale), Gustaf Stromberg, Mt. Wilson 

 Solar Observatory, Carnegie Institution (intro- 

 duced by Walter S. Adams). 



Wednesday Afternoon, S.OO-d.OO 



The coral reefs of Tutuila, Samoa, Alfred G. 

 Mayer, Marine Laboratory, Carnegie Institution. 



The subsidence of volcanic islands, William M. 

 Davis, Harvard University. 



A duty of the International Association of 

 Academies, William M. Davis, Harvard University. 



The work of the Anthropology Committee of the 

 National Research Council, William H. Holmes, U. 

 S. National Museiun. 



The work of the Psychological Committee of the 

 National Research Council, Edward L. Thorndike, 

 Columbia University. 



The work of the National Research Council, 

 George E. Hale, Mt. Wilson Solar Observatory, Car- 

 negie Institution. 



Biographical memoir of James D. Dana (read 

 by title), Louis V. Pirsson, Yale University. 



Biographical memoir of Cleveland Abbe (read 

 by title), William J. Himiphreys, U. S. Weather 

 Bureau (introduced by A. L. Day). 



