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 . 



Feiday, Februaky 8, 1907. 



CONTENTS 

 The American Association for the Advance- 

 ment of Science: — 

 The Influence of Parasitism on the Host: 

 Peofessok Henby B. Wabd 201 



Scientific Books: — 



WoodMorth's The Wing Veins of Insects: 

 Pbofessob James G. Needham. Miller on 

 Minerals and How They Occur: Dr. A. R. 

 Cbook 218 



Scientific Journals and Articles 224 



Discussion and Correspondence: — 



Norton's Elements of Geology: Db. H. H. 

 Babeows 224 



Special Articles: — 



Tlie Significance of the Grasping Antenivce 

 of Harpacticoid Copepods: Pbofessob 

 Leonard W. Williams. Blowing Springs 

 and Wells of Georgia, with an Explanation 

 of the Phenomena : Dk. S. W. McCallie . . 225 



Current Notes on Land Forms: — 



Glaciation of the Big Horn Mountains, 

 Wyoming: D. W. J. Glacial Erosion in 

 the Himalayas: W. M. D. Postglacial Ag- 

 gradation of Himalayan Valleys: W. M. D. 

 Uplifted Peneplains in the Himalayas: 

 W. M. D 229 



A Mathematical Exhibit of Interest to 

 Teachers 232 



The Committee of One Hundred 234 



Scientific Notes and News 236 



University and Educational News 240 



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

 review should be sent to the Editor of Science, Garrison-oii- 



lUi Ison, N. Y. 



THE AMERICAN ASSOCIATION FOB THE 



ADVANCEMENT OF SCIENCE 



THE INFLUENCE OF PARASITISM ON 



THE HOST^ 



The line of development within the field 

 of zoological research has shown a distinct 

 tendency within recent years to move in 

 the direction of biological study, to view 

 the organism as a living thing and to seek 

 an explanation for the various problems of 

 life which present themselves in connection 

 with it. One of the earliest phases of 

 biological study found its origin in the 

 condition presented by parasitism. The 

 class of Helminthes, or intestinal worms, 

 of the earliest authors, was seen early in 

 the course of morphological study to be 

 unwarranted as a systematic grouping. 

 The animals included under the term were 

 not those which were in any genetic sense 

 related to each other. Like the earlier 

 designations of land animals and water 

 animals, these forms were grouped together 

 by virtue of similarity in conditions of 

 existence. The term is accordingly a bio- 

 logical one and its purely biological signifi- 

 cance was stoutly maintained as early as 

 1827, by the great embryologist, Carl Ernst 

 von Baer, and by F. S. Leuckart. The idea 

 received finally due acceptance through the 

 efforts of Carl Vogt, who dissociated the 

 earlier group and united its subdivisions 

 with those free living animals to which 

 they were most closely morphologically con- 



^ Address of the vice-president and chairman of 

 Section F — Zoology, American Association for the 

 Advancement of Science, New York meeting, De- 

 cember, 1906. 



