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. 



Editokial Committee : S. Newcomb, Mathematics ; E. S. Woodward, Meohanios ; E. C. Pickering, 

 Astronomy ; T. C Mendenhall, Physios ; R. H. Thurston, Engineering ; Ira Eemsen, Chemistry ; 

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

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

 Bessey, N. L. Britton, Botany ; C. S. Minot, Embryology, Histology ; H. P. Bow- 

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

 ogy ; J. McKebn Cattkll, Psychology ; J. W. Powell, Anthropology. 



Friday, August 29, 1902. 



CONTENTS: 



American Association for the Advancement 

 of Science: — 

 2'he Training and Work of a Geologist: 



Professor C. R. Van Hise 321 



Section D, Mechanical Science and Engi- 

 neering: Professor C. A. Waldo 334 



Section F, Zoology: Dr. Ch. Wardell 

 Stiles 344 



Scientific Books: — 



Comstock and Kellogg's Elements of Insect 

 Anatomy: Professok W. M. Wheeler. 

 Hellmann's Neudruche von Schriften und 

 Karten iiber Meteorologie und Erdmag- 

 netismus herausgegehen : A. Lawrence 

 RoTCH 351 



Scientific Journals and Articles 353 



Discussion and Correspondence : — 



Scientific Nomenclature: Dr. R. H. Har- 

 per 354 



Shorter Articles :— 



Man in Kansas during the lowan Stage of 

 the Glacial Period: Dr. Waeren Upham.. 355 



Notes on Inorganic Chemistry : J. L. H 356 



Scientific Notes and News 357 



University and Educatiotial News 360 



USS. ioteaded for publication and books, etc., Intended 

 for leTlew should be sent to tha responsible editor. Pro. 

 feasor J. UcKeun Cattell, OerrlBon-on-Hudson, N. Y. 



THE TRAINING AND WORK OF A 

 GEOLOGIST* 



Geology is a dynamic science, subject to 

 the laws of energy. Geology treats of a 

 world alive, instead of, as commonly sup- 

 posed, a world finished and dead. The 

 atmosphere, or sphere of air, is ever un- 

 quiet ; the hydrosphere, or sphere of water, 

 is less active, but still very mobile; the 

 lithosphere, or sphere of rock, has every- 

 where continuous although slow motions. 

 The motions of the atmosphere, the 

 hydrosphere, and the lithosphere alike 

 include body motions by which the posi- 

 tions of large masses of material are 

 changed, and interior motions, through 

 which the mineral particles are constantly 

 rearranged with reference one to another, 

 and indeed are constantly remade. Fur- 

 thermore, the molecules and even the atoms 

 which compose the atmosphere, hydrosphere 

 and lithosphere have motions of marvelous 

 intricacy and speed. These motions of the 

 atmosphere, the hydrosphere and the litho- 

 sphere, are all superimposed upon the as- 

 tronomical motions— the wobbling revolu- 

 tion of the earth about its axis, the revo- 

 lution of the earth-moon couple about 

 their common center of gravity, the move- 

 ment of this couple about the sun at 

 the rate of 68,000 miles per hour., the 



* Vice-Pregidential address, Section E, Geology 

 and Geography, American Association for the Ad- 

 vancement of Science, Pittsburgh Meeting, 1902. 



