SCIENCE. 



[X. S. Vol. XXI. Xo. 535. 



nosed, the cases in question having been diag- 

 nosed as tumor of brain and locomotor ataxia, 

 respectively, and their true nature revealed 

 only by the autopsy. The proceedings of the 

 Philadelphia Neurological Society for No- 

 vember 22, 1904, are reported, and the ' Peri- 

 scope ' contains numerous abstracts. 



SOCIETIES AND ACADEMIES. 



THE AMERICAN MATHEMATICAL SOCIETY. 



The one hundred and twenty-second regular 

 meeting of the American Mathematical So- 

 ciety was held at Columbia University, on 

 Saturday, February 25, 1905. The attend- 

 ance at the two sessions was about fifty, in- 

 cluding forty-tvvo members of the society. 

 The vice-presidents, Professors Pierpont and 

 E. W. Brown, presided at the morning and 

 afternoon sessions respectively. The council 

 announced the election of the following per- 

 sons to membership in the society: Miss A. F. 

 Becker, Yeatman High School, St. Louis, 

 Mo.; Professor C. H. Beckett, Purdue Uni- 

 versity; Professor W. De W. Cairns, Oberlin 

 College; Professor S. C. Davisson, Indiana 

 University; Dr. J. S. French, Jacob Tome 

 Institute; Mr. F. H. Hodge, Clark University; 

 Mr. A. E. Joslyn, Armour Institute of Tech- 

 nology; Dr. J. W. Lowber, Austin, Texas; 

 Mr. J. H. Maclagan-Wedderburn, University 

 of Chicago; Mr. G. A. Plimpton, New York 

 City; Mr. E. W. Ponzer, University of 

 Hlinois; Mr. H. W. Reddick, University of 

 Illinois ; Miss M. E. Sinclair, University of 

 Nebraska; Dr. A. W. Smith, Colgate Univer- 

 sity. Ten applications for membership were 

 received. 



Professor E. B. Van Vleck was elected a 

 member of the Editorial Committee of the 

 Transactions, to succeed Professor T. S. Fiske, 

 who retires with the completion of the present 

 volume. 



The following papers were read at this 

 meeting : 



L. D. Ames : ' The theorem that a closed simple 

 surface is bilateral.' 



C. L. BouTOX: ' Xote on isothermal curves and 

 one-parameter groups of conformal transforma- 

 tions in the plane.' 



E. \V. Hkowx : ' Xote on the variation of the 



arbitrary and given constants in dynamical equa- 

 tions.' 



O. E. Glenn: 'Determination of the abstract 

 groups of order jrqr.' 



F. R. Shakpe: ' The stability of the motion of a 

 viscous liquid.' 



James Piekpont : ' Xote on infinite products.' 



Charlotte A. Scott: 'The elementarj- treat- 

 ment of conies by means of the regulus.' 



A. W. Smith : ' The symbolic treatment of dif- 

 ferential geometry.' 



A. M. Hiltebeitel : ' Xote on a problem in me- 

 chanics.' 



R. B. Allen : ' Hypercomplex number systems 

 with respect to a domain of rationality.' 



L. P. EiSENHART : ' Xote on the deformation of 

 surfaces of translation.' 



A meeting of the San Francisco Section of 

 the society was also held on February 25, at 

 Stanford University, The next meeting of 

 the society falls on Saturday, April 29. The 

 Chicago Section v;ill meet at the University 

 of Chicago, April 22. The summer meeting 

 of the society will be held at Williams College, 

 Williamstown, Mass., September 7-8. 



F. N. Cole, 

 Secretary. 



THE NEW YORK ACADEMY OF SCIENCES. 

 SECTION OF GEOLOGY AND MINERALOGY. 



At the meeting on March 6 the following 

 paper was read by title : 



On the Absence of Helium from Carnotite: 

 Dr. E. P. Adams. 



The following paper was presented in full: 



Notes on the Minnewasha Region, Ulster Co., 



New YorJc: F. Wilton James. 



The stripping of the grit from the crest of 

 the second anticline of the Shawangunk* 

 appears to be due to a slight cross fold by 

 anticlinal fracture and erosion, as the rocks 

 at the southwest end of the eroded area show 

 an upward pitch. Through this depression 

 the Peterskill probably flowed while its own 

 valley and Coxing Clove were dammed by the 

 front of the ice sheet, and cut then the Paltz 

 Gap in the crest of the first anticline, 200 

 feet deep, through which the road to New 

 Paltz now runs. 



* Daiton, Rep. 47, X. Y. State Mus. 



