708 



SCIENCE. 



[N. S. Vol. XXIV. No. 622. 



case with the corresponding tartaric acids, for 

 example. 



Should these observations be confirmed it 

 can hardly fail to modify profoundly our con- 

 ception of the spatial relations and stereo- 

 chemistry of organic compounds. The authors 

 believe that their new compounds are similar, 

 spatially, to allene (isoallylene) derivatives of 

 the type, 



5>c:c:c<^, 



which might exist in two forms, each one of 

 which would be the mirror image of the other, 

 as was pointed out by Van't Hoff in his clas- 

 sical work on the spatial relations of the atom. 

 J. Bishop Tingle. 

 Johns Hopkins University, 

 October, 1906. 



THE CONVOCATION WEEK MEETINGS OF 

 SCIENTIFIC SOCIETIES. 



The American Association for the Advance- 

 ment of Science and the national scientific 

 societies named below will meet in New York 

 City during convocation week, beginning on 

 December 27, 1906. 



American Association for the Advancement 

 of Science. — December 2 7- January 1. Retiring 

 president. Professor C. M. Woodward, Washing- 

 ton University, St. Louis, Mo.; president-elect. 

 Professor W. H. Welch, The Johns Hopkins Uni- 

 versity, Baltimore, Md. ; permanent secretary. Dr. 

 L. 0. Howard, Cosmos Club, Washington, D. C; 

 general secretary. Dr. John F. Hayford, U. S. 

 Coast and Geodetic Survey, Washington, D. C; 

 secretary of the council. President F. W. McNair, 

 Houghton, Mich. 



Local Executive Committee. — J. J. Stevenson, 

 chairman, C. C. Adams, Charles Baskerville, 

 Franz Boas, N. L. Britton, H. C. Bumpus, Chas. 

 A. Conant, Simon Flexner, Wm. J. Gies, Wm. 

 Hallock, Alex. C. Humphreys, G. S. Huntington, 

 Edward Kasner, Henry F. Osborn, C. L. Poor, 

 Clifford Richardson, E. B. Wilson, Frederick J. 

 E. Woodbridge, J. McKeen Cattell, secretary. 



Section A, Mathematics and Astronomy. — Vice- 

 president, Professor Edward Kasner, Columbia 

 University; secretary, Professor L. G. Weld, Uni- 

 versity of Iowa, Iowa City, Iowa. 



Section B, Physics. — ^Vice-president, Professor 

 W. C. Sabine, Harvard University; secretary. Pro- 

 fessor Dayton C. Miller, Case School of Applied 

 Science, Cleveland, Ohio. 



Section C, Chemistry. — Vice-president, Mr. 

 Clifford Richardson, New York City; secretary, 

 Professor Charles L. Parsons, New Hampshire 

 College of Agriculture, Durham, N. H. 



Section D, Mechanical Science and Engineer- 

 ing. — ^Vice-president, Mr. W. R. Warner, Cleve- 

 land, 0.; secretary, Professor Wm. T. Magruder, 

 Ohio State University, Columbus, Ohio. 



Section E, Geology and Geography. — Vice-presi- 

 dent, Dr. A. C. Lane, Lansing, Mich.; secretary. 

 Dr. Edmund 0. Hovey, American INIuseum of 

 Natural History, New York, N. Y. 



Section F, Zoology. — Vice-president, Professor 

 E. G. Conklin, University of Pennsylvania; secre- 

 tary, Professor C. Judson Herrick, Denison Uni- 

 versity, Granville, Ohio. 



Section G, Botany. — Vice-president Dr. D. T. 

 MacDougal, Washington, D. C. ; secretary. Pro- 

 fessor F. E. Lloyd, Desert Botanical Laboratory, 

 Tucson, Arizona. 



Section H, Anthropology. — Vice-president, Pro- 

 fessor Hugo Miinsterberg, Harvard University; 

 secretary, George H. Pepper, American Museiim 

 of Natural History. 



Section I, Social and Economic Science. — Mr. 

 Clias. A. Conant, New York City; secretary. Dr. 

 J. F. Crowell, Bureau of Statistics, Washington, 

 D. C. 



Section E, Physiology and Experimental Medi- 

 cine. — Vice-president, Dr. Simon Flexner, The 

 Rockefeller Institute for Medical Research; secre- 

 tary. Dr. Wm. J. Gies, College of Physicians and 

 Surgeons, Columbia University, New York City. 



The American Society of Naturalists. — Decem- 

 ber 28. President, Professor William James, 

 Harvard U^niversity; secretary. Professor W. E. 

 Castle, Harvard University. 



The Astronomical and Astrophysical Society of 

 America. — December 28. President, Professor E. 

 C. Pickering, Harvard College Observatory; secre- 

 tary. Professor Geo. C. Comstock, Washburn Ob- 

 servatory, Madison, Wis. 



The American Physical Society. — President, 

 Professor Carl Barus, BroAvn University; secre- 

 tary. Professor Ernest Merritt, Cornell LTniver- 

 sity, Ithaca, N. Y. 



The American Mathematical Society. — Decem- 

 ber 28, 29. President, Professor W. F. Osgood, 

 Harvard University; secretary. Professor F. N. 

 Cole, Columbia University. 



The American Chemical Society. — December 

 27-January 2. President, Professor W. F. Hille- 

 brand, U. S. Geological Survey; secretary. Dr. 

 William A. Noyes, the Bureau of Standards, 

 Washington, D. C. 



