542 



SCIENCE. ■ 



[N. S. Vol. XIX. No. 483. 



the society at dinner on Friday evening, April 

 8. The University Club, 1510 Walnut Street, 

 extends the courtesies of its house to the visit- 

 ing members during their stay in Philadel- 

 phia. 



The preliminary program is as follows : 



Db. Charles Conbad Abbott, of Trenton, N. J. : 

 ' On the Occurrence of Artifacts Beneath a De- 

 posit of Clay.' 



Dr. Charles Conrad Abbott, of Trenton, N. J. : 

 ' On the Breeding Habits of the Spade Foot Toad 

 {Scaphiopus solitariiis) .' 



Professor L. H. Bailey, of Ithaca, N. Y. : 

 ' Summary of the Recent Movements to Teach 

 Agriculture in the Schools.' 



Professor Carl Barus, of Providence, R. I. : 

 ' Atmospheric Nueleation.' 



Dr. Franz Boas, of New York : ' The Horizontal 

 Plane of the Skull.' 



Du. Aristhjes Brezina, of Vienna : ' On the 

 Collecting of Meteorites.' 



Professor William Keith Brooks, of Balti- 

 more : ' DoUolum and Scalpa.' 



Professor William W. Campbell, of Mt. 

 Hamilton, Cal.: 'On the Spectra and General 

 Nature of Temporary Stars' (with lantern slide 

 illustrations) . 



Peofessoe Edwin Grant Conklin, of Phila- 

 delphia : ' The Organization of the Germ Cells 

 and Its Bearings on Evolution.' 



Professor Charles L. Doolittle, of Phila- 

 delphia : ' The Reflex Zenith Tube.' 



Mr. Eric Doolittle, of Philadelphia : ' Faint 

 Double Stars.' 



Db. Chables B. Dudley, of Altoona, Pa. : ' A 

 System of Passenger Car Ventilation.' 



Peofessob John B. Hatcher, of Pittsburg, 

 Pa. : ' An Attempt to Correlate, the Marine with 

 the Fresh and Brackish Water Mesozoic Forma- 

 tions of the Middle West.' 



Professor Paul Haupt, of Baltimore : ' Biblical 

 Pessimism.' 



Professor Angelo Heilprin, of Philadelphia: 

 ' Pompeii and Saint Pierre : an Examination of 

 the Plinian Narration, and Other Studies' (with 

 lantern slide illustrations). 



Professor Waterman T. Hewett, of Ithaca, 

 N. Y. : ' The Use of the Relative Pronouns in 

 Standard English Writers.' 



Waldemar Jochelson, of New York : ' The 

 Yukaghis Language.' 



Professor H. F. Keller, of Philadelphia: 

 ' Dimethyl Racemic Acid, Its Synthesis and De- 

 rivatives.' 



Professor Henby Kramer, of Pliiladelphia: 

 ' The Origin and Nature of Color in Plants.' 



Peofessob Peeston A. Lambeet, of Bethlehem, 

 Pa. : ' The Expansion of Algebraic Functions at 

 Singular Points.' 



Peofessob Maeion D. Learned, of Philadel- 

 phia : ' Results of the American Ethnographical 

 Survey.' 



Professor LeRoy W. McCay, of Princeton: 

 ' Trisulphoxyarsenic Acid.' 



Professor John Marshall, of Philadelphia: 

 ' The Constituents of the Venom of the Rattle- 

 snake.' 



Professor Otis T. Mason, of Washington: 

 ' The Ripening of Thoughts in Common.' 



Dr. Charles A. Oliver, of Philadelphia: 

 ' Regulation of Color-Signals in Marine and Naval 

 Service.' 



Professor A. H. Phillips, of Princeton, N. J. : 

 ' Radium from American Ores.' 



Professor Albebt B. Peescott, of Ann Arbor, 

 Mich.: 'The Role of Carbon.' 



Professoe Theodobe W. Richards, of Cam- 

 bridge, Mass. : ' Sources of Error in the Deter- 

 mination of the Atomic Weight of Nitrogen.' 



Peofessob Felix E. Schelling, of Philadel- 

 phia : ' The Pedigree of Elizabethan Drama.' 



Professor William B. Scott, of Princeton, 

 N. J. : ' The Miocene Rodentia of Patagonia.' 



Peofessob Edgab F. Smith and Mr. F. F. 

 EXNER, of Philadelphia : ' The Atomic Weight of 

 Tungsten.' 



'Mr. Gilbert van Ingen : ' The Silurian Fauna 

 of Arkansas.' 



Mr. Joseph Wharton, of Philadelphia : ' Pal- 

 ladium.' 



THE AMERICAN PHYSICAL SOCIETY. 



The February meeting of the Physical So- 

 ciety was held in New York on February 27. 

 For the first time since the famous address of 

 Rowland in 1899 the society had the pleasure 

 of listening to a presidential address. Pro- 

 fessor Webster's subject being ' Some Prac- 

 tical Aspects of the Relations between Physics 

 and Mathematics.' The address was delivered 

 before a joint session of the Physical So- 

 ciety and the Mathematical Society. It will 

 be published in full both in Science and 

 with the ' Proceedings of the Physical Society ' 

 in the Physical Review. 



Upon the recommendation of the council 

 certain amendments to the by-laws were adopt- 

 ed whose purpose was twofold, viz. : (1) to 



