790 



SCIENCE 



[N. S. Vol. XXXIII. No. 855 



' ' Biological Conclusions drawn from the Evolu- 

 tion of the Titanotheres, " H. F. Osborn. 



"A New Reptile from the Newark Beds," W. 

 B. Scott. 



" Restorations and Ontogeny of the Euryp- 

 terids, " J. M. Clarke. 



"A Geological Reconnaissance in the Rocky 

 Mountains of British Columbia," Chas. D. Wal- 

 cott. 



"Comparative Study of the Early Stages of 

 Vertebrates," C. S. Minot. 



"Infantile Paralysis and its Mode of Transmis- 

 sion," Simon Flexner (read by C. S. Minot). 



"Cell-size and Nuclear-size," E. G. Conklin. 



"The Cause of Death of the Unfertilized Egg 

 and the Cause of the Life-saving Action of Fer- 

 tilization, ' ' Jacques Loeb. 



' ' Studies of the Pulmonary Circulation, ' ' Ho- 

 ratio Wood, Jr. (introduced by H. 0. Wood). 



' ' An American Lepidostrobus, " J. M. Coulter. 



"Aristotle's History of Animals," Theo. Gill. 



"Notes on New England Mollusca," E. S. 

 Morse. 



"Changes in Bodily Form of Descendants of 

 Immigrants," Franz Boas. 



"Classification of Shoshonean Tribes," C. Hart 

 Merriam. 



"The Outside and the Inside of the Tosemite 

 Indian," C. Hart Merriam. 



"Biographical Memoir of W. H. C. Bartlett," 

 E. S. Holden. 



"Biographical Memoir of C. B. Comstock," H. 

 L. Abbot. 



"Biographical Memoir of S. W. Johnson," T. 

 B. Osborne. 



"Biographical Memoir of Benjamin Silliman, 

 1816-1885," A. W. Wright. 



' ' Biographical Memoir of James H. Trumbull, ' ' 

 A. W. Wright. 



"Biographical Memoir of C. A. White," Wm. 

 H. Dall. 



"Biographical Memoir of Joseph Leidy," 

 Henry Fairfield Osborn. 



THE AMERICAN MATHEMATICAL SOCIETY 



The one hundred and fifty-third regular meet- 

 ing of the society was held at the University of 

 Chicago on Friday and Saturday, April 28-29, 

 1911, the occasion being especially marked by the 

 presidential address of Professor Maxime Bocher 

 on ' ' Charles Sturm 's Published and Unpublished 

 Work on Differential and Algebraic Equations. ' ' 

 This was the first regular meeting of the society. 



except the summer meetings, that has been held 

 elsewhere than in New York city. The attend- 

 ance exceeded all previous records, reaching a 

 total of 115, including 88 members. Fifty-three 

 papers were presented at the four sessions. 



The president of the society. Dean H. B. Fine, 

 of Princeton University, occupied the chair, being 

 relieved by Professor G. A. Miller and Vice-presi- 

 dent G. A. Bliss. The council announced the 

 election of the following persons to membership 

 in the society: Professor H. Bateman, Bryn Mawr 

 College; Mr. Samuel Beatty, University of To- 

 ronto; Professor J. H. Griflath, University of 

 Michigan; Mr. E. J. Moulton, Harvard Univer- 

 sity; Mr. George Spitzer, Agricultural Experiment 

 Station, Purdue University; Professor C. J. West, 

 Ohio State University. Eleven applications for 

 membership in the society were received. 



Professor L. E. Dickson was reelected to the 

 editorial board of the Transactions for a term of 

 three years. A committee was appointed to ar- 

 range for the summer meeting and colloquium to 

 be held at the University of Wisconsin in 1913. 



Friday evening was devoted to the usual dinner, 

 at which 73 members were present. 



The following papers were read at this meeting: 



Daniel Buchanan: "A class of periodic solu- 

 tions of the problem of three bodies, two of equal 

 mass, the third moving in a straight line. ' ' 



H. E. Buchanan : ' ' An expansion of elliptic 

 functions with applications. ' ' 



D. R. Curtiss : ' ' Relations between the Gram- 

 ian, the Wronskian, and a third determinant con- 

 nected with the problem of linear dependence." 



L. L. Dines : ' ' On the representation of result- 

 ants of polynomials in one variable. ' ' 



L. L. Dines : ' ' On the solution of three equa- 

 tions for three variables in terms of others. ' ' 



W. D. MacMillan: "A reduction of a system 

 of power series to an equivalent system of poly- 

 nomials. ' ' 



W. D. MacMillan: "A method for finding the 

 solutions of a set of analytic functions in the 

 neighborhood of a branch point. ' ' 



R. L. Moore : ' ' On the transformation of double 

 integrals. ' ' 



Maxime Bocher (presidential address) : ' ' Charles 

 Sturm's published and unpublished work on dif- 

 ferential and algebraic equations. ' ' 



L. P. Eisenhart: "A fundamental parametric 

 representation of space curves. ' ' 



A. E. Young: "On certain orthogonal systems 

 of lines and the problem of determining surfaces 

 referred to them. ' ' 



Arnold Bmch : ' ' The differential equation of 

 curves of normal stresses in a plane field. ' ' 



A. B. Frizell: "A set of postulates for well- 

 ordered types. ' ' 



C. J. Keyser: "Sensuous representation of 

 paths that lead from the inside to the outside of 



