SCIENCE 



A WEEKLY JOURNAL DEVOTED TO THE ADVANCEMENT OF SCIENCE, PUBLISHING THE 



OFFICIAL NOTICES AND PROCEEDINGS OF THE AMERICAN ASSOCIATION 



FOR THE ADVANCEMENT OF SCIENCE. 



Editorial Committee : S. Nkwoomb, Mathematics ; E. S. Woodwaed, Mechanics ; E. C. Pickering, 

 Astronomy ; T. C Mkndbnhall, Physics ; R. H. Thdrston, Engineering ; lEA Eemsen, Chemistry ; 

 Charles D. Walcott, Geology ; W. M. Davis, Physiography ; Henry F. Osboen, Paleon- 

 tology ; W. K. Brooks, 0. Hart Merriam, Zoology ; S. H. Scudder, Entomology ; C. E. 

 Bessey, N. L. Beitton, Botany ; C. S. MiNOT, Embryology, Histology ; H. P. Bow- 

 DiTCH, Physiology ; J. S. Billings, Hygiene ; William H. Welch, Pathol- 

 ogy ; J. McKbbn Cattell, Psychology ; J. W. Powell, Anthropology. 



Friday, April 4, 1902. 



CONTENTS: 



The American Morphological Society: Dr. M. 



M. Metcalf 521 



Tiventy years of Section E, Anthrojiology : 



Dr. Geoege Grant MacCbrdy 532 



College Work for Agriculturists : Professor 



R. H. Thurston 534 



Scientific Books: — 



Boozehoom on Die heterogenen Oleich- 

 geioichte, Ostwald's Analytic Chemistry: 

 Professor Wilder D. Bancroft. The 

 Engineering Index: Professor Mansfield 

 Mebriman. Sanderson on Insects lujurious 

 to Staple Crops: P. H. Chittenden 537 



Scientific Journals and Articles 541 



Societies and Academies: — 



Science Club of the University of Wis- 

 consin: C. K. Leith. Philosophical Society 

 of Washington: Charles K. Wead. 

 Anthropological Society of Washington: 

 Walter Hough. The Geological Society of 

 Washington: Alfred H. Brooks. New 

 York Academy of Sciences: Section of 

 Anthropology and Psychology: Dr. R. S. 

 Woodworth. Section of Astronomy, Phys- 

 ics and Chemistry. Dr. F. L. Tufts. The 

 Academy of Science of St. Louis: Pro- 

 fessor William Trelease. The Colorado 

 Academy of Science: Will C. Fereil. The 

 Elisha Mitchell Scientific Society: Pro- 

 fessor Chas. Baskeeville. Neio York 

 Association of Biology Teachers: G. W. 

 Hunter, Jr 542 



Discussion and Correspondence: — 



Movements toward Union among Geog- 

 raphers: Dr. W J McGee. Baldwin's 

 Social and Ethical Interpretations: Dr. 

 Gustavo Tosti. Carnegie Institution.... 549 



Shorter Articles: — 



Discharge from Hot Platinum Wires: 

 Professor C. D. Child 553 



Paleontological Notes : — 



North American Elephantids : P. A. L . . . . 554 

 Current Notes on Meteorology : — 



The Dust Storm of March 9-12, 1901; 



Meteorological Charts of the Great Lakes; 



The Seismograph as a Sensitive Barometer : 



Professor R, DeC. Ward 555 



Scientific Notes and News 557 



University and Educational News 560 



MSS. iniended for publication and books, etc., intended 

 for review stiould be sent to the responsible editor, Pro- 

 f-'saor.T. MntCupn 'ia.ttell, GRrrison-rm-Hnclson, N. Y. 



AMERICAN MORPHOLOGICAL SOCIETY. 



I. 



At the annual meeting of the American 

 Morphological Society, held at the Univer- 

 sity of Chicago December 31, 1901, and 

 January 1 and 2, 1902, the following 

 papers were presented: 



The Physiological Zero and the Index of 

 Development for the Egg of the Domes- 

 tic Fowl, Gallus Domesticus: Charles 

 Lincoln Edwards. 



From the study of 238 eggs distributed 

 in 23 incubations of about six days each, 

 and from the measurement of 59 unincu- 

 bated eggs the following conclusions were 

 derived : 



1. The physiological zero, or the temper- 

 ature below which there is no development, 

 previously given by most authors at 28°, 

 and by one at 25°, is established at the 

 degree included between 20° and 21°. 



2. The index of development is given 

 for temperatures from 20°-21° to 30.75°. 



