654 



SCIENCE. 



[N. S. Vol. XXIV. No. 621. 



invertebrates, the general rule seems to hold 

 that light and low temperature induce a distal 

 migration, and the absence of light and high 

 temperature a proximal migration of the con- 

 tained pigments. ' Some Eeactions of Cater- 

 pillars and Moths,' by Alfred G. Mayer and 

 Caroline G. Soule. Larvae of Danais plexip- 

 pus are negatively geotropic, and also posi- 

 tively heliotropic to ultra-violet rays. These 

 reactions serve to maintain them high up 

 upon their food plant, and to prevent their 

 wandering away. Caterpillars have no asso- 

 ciative memory lasting more than one and a 

 half minute, and they do not learn a labyrinth. 

 Normal gipsy moth females select against 

 males if the latter be deprived of wings, but 

 if the females be deprived of sight they do 

 not select against such males. In moths there 

 is no sexual selection in respect to color. 

 ' Modifiability in Behavior. II. Factors De- 

 termining Direction and Character of Move- 

 ment in the Earthworm,' by H. S. Jennings. 

 This is an analytical study of the various 

 factors, internal and external, which decide 

 how the earthworm shall move at a given 

 moment. The matter is found to be extremely 

 complicated. 



SOCIETIES AND ACADEMIES. 

 THE AMERICAN MATHEMATICAL SOCIETY. 



The one hundred and thirtieth regular meet- 

 ing of the American Mathematical Society 

 was held in New York City, on Saturday, 

 October 27, 1906, thirty-three members being 

 in attendance. President W. F, Osgood pre- 

 sided at the morning session, Ex-President T. 

 S. Fiske at the afternoon session. The council 

 announced the election of the following persons 

 to membership in the society: Professor A. F. 

 Carpenter, Hastings College; Dr. H. M. 

 Dadourian, Yale University; Mr. T. E. Gra- 

 vatt, Pennsylvania State College; Rev. A. S. 

 Hawkesworth, Allegheny, Pa. ; Mr. H. R. 

 Higley, Pennsylvania State College ; Dr. Mario 

 Kiseljak, Fiume, Hungary; Dr. Emanuel 

 Lasker, New York, N. Y. ; Professor Ernst 

 Lebon, Lycee Charlemagne, Paris; Dr. R. L. 

 Moore, Princeton University; Mr. W. P. Rus- 

 sell, Pomona College; Professor J. H. Scar- 

 borough, State Normal School, Warrensburg, 



Mo. ; Mr. L. P. Siceloff, Columbia University ; 

 Professor Cyparissos Stephanos, University of 

 Athens. One application for membership was 

 received. The total membership of the so- 

 ciety is now five hundred and fifty-eight. 



A list of nominations of officers and other 

 members of the council was adopted and or- 

 dered placed on the official ballot for the an- 

 nual election at the December meeting. A 

 committee was appointed to audit the treas- 

 urer's accounts for the current year. 



Professor W. F. Osgood tendered his resig- 

 nation from the editorial committee of the 

 Transactions, finding it impossible to assume 

 the burdens of the office. The vacancy was 

 filled by the appointment of Professor H. S. 

 White. 



The following papers were read at the meet- 

 ing: 



S. F. Richardson : ' Note on poristic systems of 

 polygons.' 



11. D. Carmichael : ' Multiply perfect numbers 

 of four different primes.' 



Arthur Ranum : ' On Jordan's linear con- 

 gruence groups'.' 



Beppo Levi : ' Geometric projettive di congru- 

 enza e geometrie projettive finite.' 



Charlotte A. Scott : ' Note on regular poly- 

 gons.' 



Max Mason and G. A. Bliss : ' Some problems 

 in the calculus of variations in space with vari- 

 able end points.' 



Edward Kasner : ' Note on the transforma- 

 tions of dynamics.' 



G. A. Miller: 'Groups of order pm containing 

 exactly p -\- I abelian subgroups of order p'«— i. 



G. A. Miller : ' The groups in which every sub- 

 group is either abelian or hamiltonian.' 



The San Francisco section of the society 

 met at the University of California, on Satur- 

 day, September 29, 1906. 



The next meeting of the society will be the 

 annual meeting for the election of officers on 

 Friday and Saturday, December 28-29, 1906. 

 The Chicago section will also meet during the 

 Christmas holidays. W. H. Bussey, 



Assistant Secretary. 



the AMERICAN PHILOSOPHICAL SOCIETY. 



A STATED meeting was held on November 

 16, 1906, at 8 o'clock. Professor Harry F. 



