Maech 30, 1900.] 



SCIENCE. 



509 



Geometric patterns occur, but rarely, and the 

 general character of the art is suggestive rather 

 of pictography. Symbols representing animal 

 life, physical nature, and abstract ideas pre- 

 dominate. 



Dr. Franz Boas presented a paper on ' The 

 Growth of Children.' A series of measure- 

 ments of children repeated at annual intervals 

 proves that the variations of growth must be in- 

 terpreted as mainly due to acceleration and re- 

 tardation of growth, combined with hereditary 

 influences, which determine the amount of 

 annual growth. It was sho\vn that it is possible 

 to determine the essential elements which de- 

 termine the amount of annual growth by ad- 

 mission of regulated measurements. These 

 result in a determination of (1) the relation be- 

 tween final development and development at 

 any given period ; (2) the typical development 

 at a given period ; and (3) the variability of the 

 series in regard to period. 



Chaeles H. Judd, 



Secretary. 



ZOOLOGICAL CLUB, UNIVERSITY OF CHICAGO. 



At the meeting of January 10th, Mr. R. H. 

 Johnson presented a paper prepared in collab- 

 oration with Mr. R. W. Hall, entitled ' Varia- 

 tion in Palaemonetes correlated with Salinity.' 

 After calling attention to the fact that our marine 

 species of Palaemonetes differ from the fresh- 

 water form in presenting a greater number of 

 rostral teeth, Mr. Johnson stated that various 

 lots of the marine species which were collected 

 in brackish water show an intermediate con- 

 dition as regards the rostral teeth. A complete 

 series of intermediate forms exists and the 

 natural inference is that the different degrees 

 of salinity cause the observed differences in 

 form. The experiment of rearing the animals 

 in media of different degrees of salinity has not 

 yet been made by the authors, but will be at- 

 tempted, as this alone will afford complete evi- 

 dence in regard to the matter. 



The second paper of the meeting was a re- 

 view by Mr. A. N. Young of several recent 

 papers, by Edmond Bordage, on regeneration in 

 insects. 



The second meeting of the month was held on 

 January 31st. The first paper of the session 



' A Review of Bresslau's paper on the Devel- 

 ment of the Rhabdocoels,' was presented by Mr. 

 B. H. Harper. 



The remainder of the session was occupied by 

 an exhibition of a very interesting series of the 

 extremely variable land snail Pyramidula siri- 

 gosa Gould, collected by Hemphill from the 

 Great Basin, a loan from the Powell Museum of 

 the Illinois Wesleyan University through the 

 kindness of Professor J. C. Hartzell. Attention 

 was called to the direction taken by some of 

 the variations. The recorded localities seem to 

 indicate that some of the varieties are quite 

 local in their distribution and that there is dis- 

 tinct geographical isolation. It was suggested 

 that the history of the topograjshy might throw 

 light upon this isolation. Gilbert's map of 

 ' Lake Bonneville ' shows that the Oquirrh 

 Mountains (the locality for the Oquirrhensis and 

 Utahensis) were then situated upon a narrow 

 peninsula. Climate may have since aided in 

 preserving this isolation. This species is of 

 special interest to students of evolution and 

 well deserves to be better and more widely 

 known. 



C. M. Child. 



THE ACADEMY OF SCIENCE OF ST. LOUIS. 



At the meeting of the Academy of Science 

 of St. Louis on the evening of February 19, 1900, 

 43 persons were present. Professor Patrick 

 Geddes, of University College, Dundee, in an 

 address of about an hour, traced the increas- 

 ingly complex relation of the world to science 

 and the rapidly increasing need of co-ordination 

 of the sciences, and then gave a concise account 

 of the purposes which it is hoped to realize and 

 the methods to be adopted by the International 

 Association for the Advancement of Science, 

 Art and Education, which grew out of the 

 meetings of the British and French Associations 

 for the Advancement of Science last autumn, 

 and is to hold its first international assembly at 

 the Paris Exposition in the course of the present 

 year, the purpose of the Association, recogniz- 

 ing the wealth of instructive material brought 

 together by the great transient museums, the 

 World's Fairs, being the fullest possible utili- 

 zation of the educational .facilities so brought 

 together. 



