524 



SCIENCE 



[N. S. Vol. LI. No. 1325 



ciety and wHah are a highly efficient instrument 

 of government, well worthy of study, will remain 

 practically as they stand. 



The oommifctee on reorganization of the society 

 is actively engaged in preparing plans for carry- 

 ing on the administrative work after the present 

 year and enlarging the society's income. It wiU 

 make specific recommendations at a later meeting. 

 A report was received from the committee on the 

 International Mathematical Union, and the forma- 

 tion of an American Section of the Union was 

 aipproved. The report of the committee on bibli- 

 ography, recommending the establishment of a 

 journal of mathematical abstracts, was approved, 

 and the committee was authorized to take steps 

 tcxward sec-uring the necessary financial support. 



In the interval between the sessions over fifty 

 memibera and friends took luncheon at the Faculty 

 dub; thirty gathered there at the dinner aft«r 

 the meeting. 



The grea,ter part of the afternoon session was 

 devoted to a symposium on Relativity at which the 

 following papers were presented: 



1. "The physical and philosophical significance 

 of the priaciple of relativity, ' ' by Professor Leigh 

 Page, of Yale University. 



2. "Geometric aspects of the Einstein theory," 

 by Professor L. P. Eisenhart, of Princeton Uni- 

 versity. 



The regular program consisted of the following 



N. A. Court: "On a pencil of nodal oubics. " 



B. L. Post: "Introduction to a general theory 

 of elementary propositions." 



E. L. Post: "Determination of all closed sys- 

 tems of truth tables." 



Jesse Douglas : ' ' The dual of area and volume. ' ' 



J. K. Whittemore: "Beciprocity in a problem 

 of relative maxima and minima." 



I. A. Barnett : ' ' Linear partial differential equa- 

 tions vrith a continuous infinitude of variables, ' ' 



I. A. Barnetit: "Punctionals invariant under 

 one-parameter contiliuous groups in the space of 

 continuous functions. ' ' 



T. R. HoUcrofit: "A classification of plane in- 

 volutions of order four." 



Tobias Dantzig : " A group of line-to-line trans- 

 formations. ' ' 



A. E. Schweitzer: "On the iterative properties 

 of the abstract field." 



J. F. Ritt: "On the conformal mapping of a 

 region into a part of itself. ' ' 



L. R. Ford: "A theorem relative to rational ap- 

 proximations to in^ational complex numbers." 



L. E. Dickson: "Recent progress in the theory 

 of numbers. ' ' 



G. D. Birkhoff: "Note on the ordinary linear 

 differential equation of the second order. ' ' 



Joseph Lipka: "The motion of a particle on a 

 surface under any positional forces. ' ' 



Joseph Lipka: "Note on velocity systems in a 

 general curved space of n dimensions." 



J. E. Rowe : ' ' Testing the legitimacy of empir- 

 ical equations by an analytical method. ' ' 



Oswald Veblen: "Relations between certain 

 matrices used in analysis situs." 



0. D. Kellogg: "A simple proof of a closure 

 theorem for orthogonal function sets. ' ' 



0. L. E. Moore: "Rotation surfaces of constant 

 cui-vature in a space of four dimensions. ' ' 



H. S. Vandiver: "On Kummer's memoir of 

 1S57 concerning Fermat's last theorem." 



Nilos Sakellariou: "A not« on the theory of 

 flexion. ' ' 



Abstracts of the papers wiU be published in the 

 secretary's report in the July issue of the society's 

 Bulletin. 



The Chicago Section held a two-day meeting at 

 Chicago on April 9-10, the program including a 

 symposium on the Maxwell field equations and the 

 theory of relativity. The San Francisco Section 

 met at Stanford University on April 10. 



The twenty-seventh summer meeting and ninth 

 colloquium of the society vrill be held at the Uni- 

 versity of Chicago during the week of September 

 6-11. The colloquium wiU open on Wednesday, 

 and will consist of two courses of five lectures 

 each by Professor G. D. Birkhoff, of Harvard 

 University, on "Dynamical systems," and Pro- 

 fessor F. R. Moulton, of the University of Chi- 

 cago, on "Certain topics in functions of infinitely 

 many variables." F. N. Cole, 



Secretary 



SCIENCE 



A Weekly Journal devoted to the Advancement ot 

 Science, publishing the official notices and pro- 

 ceedings of the American Association for 

 the Advancement of Science 



Published every Friday by 



THE SaENCE PRESS 



LANCASTER, PA. GARRISON, N. Y. 



NEW YORK. N. Y. 



Elnlered in tLe posl-e£c« at Lancutcr^ Pa.g at iscond clatf BiattflG 



