352 



SCIENCE 



[N. S. Vol. LIV. No. 1398 



will be formed to bring together in one so- 

 ciety the workers in different fields on the 

 various phases of physiological optics. In 

 this way, better cooperation will be obtained 

 between the physicist, physiologist, psycholo- 

 gist, and the artist. This year is the centen- 

 ary of the birth of von Helmholtz and one 

 session of the meeting will be devoted to com- 

 memorating his work in the fields of optics, 

 sound, and electricity. An address on " Per- 

 sonal Eecollections of von Helmholtz " will 

 be given by Dr. M. I. Pupin. Visits have 

 been arranged to the plants of the Bausch & 

 Lomb Optical Company and the Eastman 

 Kodak Company. 



THE AMERICAN ASSOCIATION FOR THE 

 ADVANCEMENT OF SCIENCE- 

 SOUTHWESTERN DIVISION 



There are being given this autumn under 

 the auspices of the Southwestern Division of 

 the American Association for the Advance- 

 ment of Science a series of lectures on the his- 

 tory of the Southwest. They are being under- 

 taken at the special request of the Frontier 

 Scoutmasters' Association, with the approval 

 and support of the El Paso Council of the 

 Boy Scouts of America. The lectures are as 

 follows : 



October 5 — The Ancient History of the South- 

 west as represented by the geological forma- 

 tions of the region : Professor W. H. Seamon, 

 Professor of Geology at the Texas School of 

 Mines. 

 October 12 — The Ancient History of the South- 

 west as represented by ruins, stone implements, 

 pottery and other remains: E. A. J. Seddon. 

 October 19 — The Spanish Exploration of the South- 

 west: Mrs. M. D. Sullivan. 

 October 26 — American Occupation of the South- 

 west: Dr. F. H. H. Roberts, principal of the 

 El Paso High School and president of the Junior 

 College. 

 November 2 — History of the Mining Industry of 

 the Southwest, from the earliest days: Lew 

 Davis, of the El Paso Times. 

 November 9 — History of Irrigation in the South- 

 west, from the earliest days on: T. H. Claus- 

 sen, of the IT. S. Eeclamation Service. 

 November 16 — History of Transportation in the 

 Southwest : G. A. Martin, of the El Paso Herald. 



November 23 — The Indian Wars in the Southwest: 



Alvin E. Null. 

 November 30 — The Present and Future of the 



Southwest: H. D. Slater, of the El Paso Herald. 



The second annual meeting of the Southwest 

 Division will be held in Tucson in the latter 

 part of next January. It is expected that the 

 meeting will be largely attended. There will 

 be four scientific sections, instead of three, as 

 at the last meeting. The Stewart Astronomical 

 Observatory will be completed by that time, 

 and Dr. Douglass hopes to dedicate it then as 

 a special feature of the meeting. 



Elliott C. Prentiss, 

 Chairman Executive Committee 



THE TORONTO MEETING OF THE AMERICAN 

 ASSOCIATION FOR THE ADVANCE- 

 MENT OF SCIENCE 



The engineering section of the American 

 Association is arranging an important pro- 

 gram for the Toronto meeting which will oc- 

 cur from December 27 to 31, 1921. The 

 arrangements for the engineering sessions 

 are in charge of Mr. J. B. Tyrrell, min- 

 ing engineer, of Toronto. The programs aim 

 to present the application of science to the 

 solution of engineering problems. Many of 

 the addresses will deal especially with the 

 recent accomplishments of scientific engi- 

 neering in Canada. It will be shown how 

 scientifically trained men have developed some 

 of the natural resources of the Dominion 

 and the means by which this has been accom- 

 plished. Addresses already arranged are on 

 the work accomplished by the Hydro-Electric 

 Power Commission of Ontario; on the mines 

 and mining plants of Canada including an 

 account of prospecting in the northern wilder- 

 nesses; on the explorations for oil carried out 

 in the valley of the McKenzie River by the 

 Imperial Oil Company, and on the work of 

 the Toronto Harbor Commission in improv- 

 ing the Toronto harbor for the accommoda- 

 tion of ships of ocean draft. All of them, and 

 especially those dealing with exploration in the 

 far north, will be of interest not only to en- 

 gineers but also to geographers and to every 

 one interested in the out-of-doors. These ad- 



