SCIENCE 



Editobial Committkb : S. Newcomb, Mathematics ; R. S. Woodward, Mechanics ; E. C. Pickbeinq ; 



Astronomy; T. C. Mendenhall, Physics; R. H. Thurston, Engineering; Ira Remsen, Chemistry; 



J. Le CoNTE, Geology; W. M. Davis, Physiography; Henry F. Osborn, Paleontology; W. K. 



Brooks, C. Hart Merriam, Zoology; S. H. Scuddee, Entomology; C. E. Bessby, N. L. 



Brition, Botany; C. S. Minot, Embryology, Histology; H. P. Bowdiich, Physiology; 



J. S. Billings, Hygiene; J. McKben Cattell, Psychology; 



J. W. Powell, Anthropology. 



Friday, Febkuaby 16, 1900. 



CONTENTS: 



The Vmit Hoff Celebration: Professor Harry 

 C. Jones 241 



Tlie Meeting of Naturalists at Chicago : Profes- 

 sor C. B. Davenpoet 246 



Some of the Problems of Limnology : PROFESSOR 

 E. A. BiRGE 253 



A Preliminary Account of some of the Eesults of the 

 Plankton Work of the Illinois Biologit:al Station : 

 Professor C. A. Kofoid 255 



Malaria and Tuberculosis 258 



Scientific Books : — 



Tarde's Social Laws: PROFESSOR LESTER F. 

 Ward. Von Ihering's die Conchylien der pata- 

 gonischen Formation: Dr. J. B. Hatcher. 

 Geological Survey of Canada : De. H. M. Ami. 

 MacBride on North American Slime 3Ioulds : 

 Peofkssoe George F. Atkinson 260 



Societies and Academies: — 



Section of Biology of the New York Academy of 

 Sciences: Peofessob Francis E. Lloyd 269 



Discussion and Correspondence : — 



Do the Reactions of the Lower Animals against 

 Injury indicate Pain Sensations ? : Dr. G. V. N. 

 Beaeboen. Plant Material for Laboratory Use 

 in the Schools . Peofessoe Geo. F. Atkinson.. 270 



Do Fishes Bememberf: Dr. Edward Thoen- 

 DIKE 273 



The German Consular Sei-vice 274 



Education in the United States 274 



Education Administration in the State of New York.. 275 



Indian University for Research 276 



Scientific Notes and Neics 276 



I and Educationul Neuis 280 



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

 foi' review should be sent to the responsible editor, Profes- 

 sor, J. McKeen Cattell, Garrison-on-Hudson, N. Y. 



THE VAN'T HOFF CELEBRATION. 



A QUAETEE of a century has passed since 

 Van't Hofif obtained the degree of Doctor 

 of Philosophy. This event was celebrated 

 on December 22, 1899, in Rotterdam, by 

 his students and a number of guests, includ- 

 ing some of the leading men of science. An 

 extra volume of the ZeUschrifi fur jyhysihal- 

 ische Chemie, containing investigations by 

 those who, at some time, had worked with 

 Van't Hoif, was published and presented to 

 him on this occasion. 



What does this mean ; why has such an 

 unusual tribute been paid to this compara- 

 tively young man ? 



There is nothing more inspiring to 

 workers in the field of science, than the 

 lives and works of those who are the leaders 

 of modern science. Let us turn to the 

 biographical sketch of Van't Hoff, by 

 Ostwald, which serves as a preface to the 

 ' Jubelband.' 



Van't Hoff is the son of a Dutch physi- 

 cian, and was born in Rotterdam, August 

 30, 1852. He received his early training 

 at a high school in his native city, and at 

 seventeen entered the Polytechnic Institute 

 in Delft. He then studied at Leiden, with 

 Kekule at Bonn, and with Wiirtz in Paris. 

 He made the doctor's degree at the Univer- 

 sity of Utrecht, on the22d of December, 1874. 

 In 1876 he became docent at the veterinary 

 school in Utrecht, and in 1877 was called 

 to the University in Amsterdam. In 1894 



