478 



SCIENCE 



[N. S. Vol. L. No. 1299 



marked by a symposium of papers of unusual 

 importance on the electron-tube, presented 

 upon invitation of the president of the 

 society. There will also be the usual program 

 of papers contributed by members in general. 

 The Central Association of Science and 

 Mathematics Teachers holds it annual meet- 

 ing on the same dates, and arrangements are 

 being made for the usual joint session. 



The provisional program of special papers 

 ■which will probably be given on Satiirday 

 morning, is as follows: 



"Phenomena in pure-timgsten filament electron 

 tubes," Irving Langmuir, The General Electric 

 Company. 



"Phenomena in oxide-coated filament tubes," 

 H. B. Arnold, The Western Eleeitric Company. 



' ' The relations of the constants of an electron 

 tube to its physical dimensions," L. A. Hazeltine, 

 Stevens Institute of Technology. 



' ' Theory of action of electron tubes as ampli- 

 fiers, ' ' John M. Miller, Bureau of Standards. 



' ' Theory of action of electron tubes as genera- 

 tors, " John H. Morecroft, Columbia University. 



' ' High power transmission sets, ' ' W. C. White, 

 The General Electric Company. 



"Telephone sets," O. B. Blaekwell, American 

 Telephone and Telegraph Company. 



Members wishing to present papers at the 

 Chicago meeting are requested to send ab- 

 stracts ready for publication, to the secretary, 

 before November 15. The secretary expects 

 to send the program to all members before 

 the meeting, but the delays in the mails are 

 so great at present that members should not 

 depend upon the program to determine their 

 attendance. 



The next following meeting of the society 

 will be held in St. Louis in the week of 

 December 29-January 3. Memb"fers are re- 

 quested to submit abstracts of papers for this 

 meeting at the earliest possible date, not wait- 

 ing for further notice. 



Dayton C. Miller, 



Secretary 



Case School of Applied Science, 

 Cleveland, Ohio 



THE HISTORY OF SCIENCE AND THE 

 AMERICAN HISTORICAL ASSOCIATION 



The readers of Science may be interested 

 to learn that at the coming annual meeting 



of the Ajnerican Historical Association a 

 conference will be devoted to the history of 

 science. This is the first time that such a 

 conference has been held, and it is earnestly 

 hoped that many of those who are interested 

 in this promising field may attend the session, 

 whether they are members of the American 

 Historical Association or not. The program, 

 as thus far arranged, comprises papers on the 

 History of Egjrptian Medicine by Thomas 

 Wingate Todd, professor of anatomy, West- 

 ern Eeserve University; on the History of 

 Algebra by Louis C. Karpinski, professor of 

 mathematics. University of Michigan; on 

 Peter of Abano, a Medieval Scientist, by 

 Lynn Thorndike, professor of history. West- 

 ern Eeserve University; and on The Problem 

 of the History of Science in the College 

 Curriculum, by Henry Crew, professor of 

 physics, Northwestern University. The con- 

 ference will take place in the Hollenden 

 Hotel, Cleveland, Ohio, at 10 a.m., Wednes- 

 day morning, December 31. 



Elbert J. Benton 



THE SECTION OF ZOOLOGY OF THE 

 AMERICAN ASSOCIATION 



The Convocation Week meetings of Sec- 

 tion r (Zoology) of The American Associa- 

 tion for the Advancement of Science will be 

 held in conjunction with those of the Amer- 

 ican Society of Zoologists at Washington 

 University, St. Louis, Mo., on December 29. 

 30 and 31, 1910. As the officers of the Amer- 

 ican Society of Zoologists are responsible for 

 the program under the rules of the American 

 Association all titles and abstracts of papers 

 should be sent to Professor W. C Allee, Lake 

 Forest, Illinois. They shoiild be in his hands 

 before December 9. The address of the retir- 

 ing vice-president of Section F, Professor 

 William Patten, will be given at the annual 

 dinner on Wednesday evening, December 31. 

 The subject of the address will be " The 

 message of the biologist." H. V. Neal, 



Secretary of Section F 



Tufts College, Mass. 



the deflection of light by gravitation 

 and the theory of relativity 



A JOINT meeting of the Eoyal Society and 

 the Eoyal Astronomical Society was held on 



