Dbcembeb 19, 1902.] 



SCIENCE. 



983 



ture is not apparent under natural conditions 

 is because the refractive properties of the 

 crystalloidal substances so nearly resemble 

 those of the associated colloidal substances, 

 Aven Nelson publishes his fourth ' Contribu- 

 tions from the Eocky Mountain Herbarium," 

 dealing with Chenopodiacece, Cratwgus, and a 

 number of miscellaneous species. A number 

 of new species are described and a new genus 

 allied to Argemone is proposed. Alexander 

 W. Evans describes a new liverwort (Diplo- 

 phylleia apiculaia) from the eastern United 

 States. 



SOCIETIES AND ACADEMIES. 

 THE AMERICAN ASSOCIATION FOR THE ADVANCE- 

 MENT OF SCTENCE. 



The fifty-second annual meeting of the 

 American Association for the Advancement 

 of Science, and the first of the Convocation 

 Week meetings, will be held in Washington, 

 D. C, December 27, 1902, to January 3, 1903. 

 The retiring president is Professor Asaph 

 Hall, U.S.N., and the president elect. Presi- 

 dent Ira Eemsen, Johns Hopkins University. 

 The permanent secretary is Dr. L. O. Howard, 

 Cosmos Club, Washington, D. C, and the 

 local secretary. Dr. Marcus Benjamin, Co- 

 lumbian University, Washington, D. C 

 President Eoosevelt is honorary president of 

 the local committee. The preliminary pro- 

 gram with information in regard to hotel 

 headquarters, railway rates, etc., will be found 

 in the issue of Science for November 21. 

 The following scientific societies will meet at 

 Washington in affiliation with the Association : 



The American Anthropological Association will 

 hold its first regular meeting during Convocation 

 Week in affiliation with Section H of the A. A. 

 A. S. President, W J McGee; secretary, George 

 A. Dorsey, Field Columbian Museum, Chicago, 111. 



The American Chemical Society will meet on 

 December 29 and 30. President, Ira Eemsen ; 

 secretary, A. C. Hale, 352A Hancock street, 

 Brooklyn, N. Y. 



The American Folk-lore Society will meet in 

 afiBliation with Section H of the A. A. A. S. 

 President, George A. Dorsey; vice-presidents, J. 

 Walter Fewkes, James Mooney ; secretary, W. W. 

 Newell, Cambridge, Mass. 



The American Microscopical Society will prob- 

 ably hold a business meeting on December 29. 

 President, E. A. Birge, Madison, Wis.; secretary, 

 H. B. Ward, University of Nebraska, Lincoln, 

 Nebr. 



The American Morphological Society will meet 

 on December 30 and 31. President, H. C. Bumpus; 

 vice-president, G. H. Parker; secretary and treas- 

 urer, M. M. Metcalf, Woman's College, Baltimore, 

 Md. 



The American Philosophical Association will 

 meet on December 30 and 31 and January 1. 

 Secretary, H. N. Gardiner, Northampton, Mass. 



The American Physical Society will meet in 

 affiliation with Section B of the A. A. A. S. 

 President, Albert A. Michelson; secretary, Ernest 

 Merritt, Cornell University, Ithaca, N. Y. 



The American Physiological Society will meet 

 on December 30 and 31. President, R. H. Chit- 

 tenden; secretary, F. S. Lee, Columbia University, 

 New York, N. Y. 



The American Psychological Association will 

 meet on December 30 and 31 and January 1. 

 President, E. A. Sanford; secretary and treasurer, 

 Livingston Farrand, Columbia University, New 

 York, N. Y. 



The^American Society of Naturalists will meet 

 on December 30 and 31. President, J. McK. 

 Cattell; vice-presidents, C. D. Walcott, L. 0. 

 Howard, D. P. Penhallow; secretary, R. G. Har- 

 rison, Johns Hopkifls University, Baltimore, Md. 



The Association of American Anatomists will 

 meet on December 30 and 31. President, G. S. 

 Huntington; vice-president, D. S. Lamb; secre- 

 tary and treasurer, G. Carl Huber, University of 

 Michigan, Ann Arbor, Mich. 



The Association of Economic Entomologists will 

 meet on December 26 and 27. President, B. P. 

 Felt; secretary, A. L. Quaintance, College Park, 

 Md. 



The Astronomical and Astrophysical Society of 

 America will meet during Convocation Week, in 

 affiliation with Section A of the A. A. A. S. 

 President, Simon Newcomb; secretary, George C. 

 Comstoek, University of Wisconsin, Madison, Wis. 



The Botanical Society of America will meet on 

 December 31 and January 1. President, B. T. 

 Galloway; secretary, D. T. MacDougal, New York 

 City. 



The Botanists of the Central and Western States 

 will meet on December 30. Committee in charge 

 of the meeting, John M. Coulter, University of 

 Chicago; D. M. Mottier, University of Indiana, 

 Bloomington, Ind.; Conway MacMillan, Univer- 

 sity of Minnesota, Minneapolis, Minn. 



