December 3, 1920] 



SCIENCE 



523 



December 27, 28 and 29) will be held in 

 Mandel Hall, entrance under the Tower, on 

 57th St. just west of University Ave. 



There will be three general sessions of the 

 association at Chicago, as follows: 



1. Monday, December 27, 8 p.m., Mandel 

 Hall, the University of Chicago. Opening 

 addresses, followed by the address of the re- 

 tiring president of the association, Dr. Simon 

 Flexner, director of the laboratories of the 

 Eockefeller Institute for Medical Research, 

 New York City. Dr. Flexner will speak on 

 " Twenty-five years of bacteriological re- 

 search. A fragment of medical science." 

 The presentation of Dr. Flexner's address will 

 be followed by a general reception, to which 

 are invited all members and friends of the 

 American Association and of the associated 

 societies, and all persons interested in science 

 and education. 



2. Tuesday, December 28, 8 :15 p.m., Mandel 

 Hall. Dr. Eobert W. "Wood, professor of 

 physics in the Johns Hopkins University, will 

 give a lecture, with demonstrations, on " High 

 power phosphorescence and fluorescence." 

 This lecture will involve recent important 

 developments in the physics of light, pre- 

 sented in such a way as to be readily under- 

 stood by every one. The experimental demon- 

 strations will be especially interesting. 



3. "Wednesday, December 29, 8:15 p.m., 

 Mandel Hall. Dr. Eobert E. Griggs, of the 

 Katmai Expeditions, National Geographical 

 Society, will give an illustrated lecture on 

 " The volcanic region of Katmai, Alaska." 

 The illustrations will be by stereoptieon slides 

 and motion pictures and will be of fascinating 

 interest. 



The "Wild-Flower Preservation Society will 

 hold a reception to visiting scientists on Tues- 

 day, December 28, at 8 p.m., in the Chicago Art 

 Institute (Michigan Avenue near the Van 

 Buren Street station of the Illinois Central 

 Eailway). Visitors will have opportunity to 

 inspect an exhibit of flower portraits, special 

 preparations, etc., which will then be installed 

 in the Art Institute. Mrs. Charles L. Hutchin- 

 son is president of the society and Mrs. 

 Charles Scribner Eaton is secretary. 



The session programs of the associated so- 

 cieties and of the sections of the association 

 (these programs being in the hands of the so- 

 ciety and section secretaries) will be an- 

 nounced in the general program of the meet- 

 ing, which will be available at the registration 

 room (Eeynolds Club, University Avenue and 

 57th Street) at 9 a.m. on Monday, December 

 27. Members of the association not attending 

 the meeting, who desire to receive copies of 

 the general program, will be supplied from the 

 permanent secretary's Washington office after 

 January 5, 1921 (as long as copies are avail- 

 able), if they make this request in a letter to 

 the permanent secretary. The session pro- 

 grams, together v?ith abstracts of papers, will 

 be published in Science, the official publica- 

 tion of the association, during the early part 

 of the new year. 



Many joint meetings, dinners, smokers, etc., 

 will be held at Chicago during the meeting, 

 by the several associated societies and the sec- 

 tions of the association. These will be an- 

 nounced in the general program. 



One of the important features of the asso- 

 ciation meetings has long been the oppor- 

 tunity offered for personal contacts among 

 scientific and educational workers and their 

 friends, but it is frequently somewhat difficult 

 for one to find out whether a certain person is 

 present or not and where he is staying if pres- 

 ent. An attempt will be made at the Chicago 

 meeting to remove the difficulty just men- 

 tioned, by maintaining a continuously cor- 

 rected directory of all registrants. This di- 

 rectory will be conveniently placed in the 

 registration room and may be readily consulted 

 at any time. It will consist of a series of 

 slips posted in a suitable place, arranged in a 

 single alphabet by surnames. Each slip will 

 show the name of the registrant, his home ad- 

 dress and the name of the hotel, etc., where he 

 is stopping for the meeting. Only a few min- 

 utes will elapse between the presentation of 

 the registration card at the desk and the ap- 

 pearance of the corresponding slip in the 

 visible directory. It is hoped that this ar- 

 rangement will prove a source of satisfaction 

 to those in attendance. _ 



