36 



SCIENCE 



[N. S. Vol. XLII. No. 1070 



Sanf ord in his peach, tree would act as a stimu- 

 lant to the tree as in other work upon the 

 effects of fumigating greenhouse plants with 

 hydrocyanic acid evidence has heen obtained 

 of stimulation, the results of which will be 

 published later. 



William Moore, 

 a. g. euggles 

 Division op Entomology, 

 Minnesota Experiment Station, 

 St. Paul, Minn. 



TEE AMEBIC AN ASSOCIATION FOS THE 



ADVANCEMENT OF SCIENCE 



SECTION B, PHYSICS 



Bt combining their interests Section B of 

 the American Association for the Advance- 

 ment of Science and the American Physical 

 Society always have exceedingly profitable 

 joint meetings; meetings at which nearly all 

 the progressive physicists of the States and of 

 Canada become personally acquainted and 

 from which they return to their respective 

 laboratories taking with them the inspiration 

 of new ideas and the cheer of many friend- 

 ships. 



The recent Philadelphia meeting, at which 

 President Ernest Merritt of the American 

 Physical Society and Vice-president Anthony 

 Zeleny of the American Association for the 

 Advancement of Science alternately presided, 

 was typical of these delightful and helpful 

 occasions. 



The address of the retiring vice-president 

 and chairman of Section B, Dr. A. D. Cole, 

 was on "Recent Evidence for the Existence 

 of the Nucleus Atom." 



The structure of the atom has been and still 

 is the goal of modern physical investigation. 

 Possibly it may never be attained, but the 

 failure to attain it should not be regretted so 

 long as endeavors to this end continue to yield, 

 as heretofore, such valuable incidental dis- 

 coveries. Dr. Cole's address, published in full 

 in the January 15 issue of Science, reviews a 

 number of the more recent of these discoveries, 

 and also gives references to many original 

 papers. Both addresses and references will be 

 of great assistance to every physicist who really 



is interested, whether actively or passively, in 

 that baffling yet enticing subject, the structure 

 of the atom. 



The usual symposium consisted, at this 

 meeting, of addresses on " The Use of Dimen- 

 sional Equations," by Dr. Edgar Buckingham 

 and Dr. A. C. Lunn, followed by discussions 

 by Dr. W. S. Franklin, Dr. A. G. Webster, 

 and others. 



Dr. Buckingham's address, following some- 

 what his paper in the October, 1914, issue of 

 the Physical Review, emphasized the practical 

 use of dimensional equations in the logical or 

 mathematical discussion of physical problems. 



Dr. Lunn considered the mathematical and 

 metaphysical aspects of the subject, and so 

 interestingly that it is to be hoped that he too 

 will publish in full his contributions to this 

 subject. 



The discussion and remarks that followed 

 the principal papers indicated a recognition of 

 the importance of the subject, but also a frank 

 admission that its daily use in the laboratory 

 and the classroom is, perhaps, rather limited. 



The sectional committee nominated, and the 

 general committee later elected, Professor 

 Frederick Slate vice-president and chairman 

 of Section B. Professor Slate, however, was 

 unable to serve and a new election therefore 

 was necessary. This was completed at the 

 April meeting of the Council, resulting in the 

 selection of Dr. E. P. Lewis, of the Univer- 

 sity of California. 



At present the officers of Section B are as 

 follows : 



Vice-president and Chairman of the Section, 

 E. Percival Lewis, University of California, 

 Berkeley, Cal. 



Secretary, WiUiam J. Humphreys, Weather 

 Bureau, Washington, D. C. 



Member of Council, Gordon F. Hull, Dart- 

 mouth College, Hanover, N. H. 



Sectional Committee, Vice-president, Phila- 

 delphia, Anthony Zeleny; Vice-president, San 

 Francisco and Columbus, E. Percival Lewis; 



Secretary, WiUiam J. Humphreys, Weather 

 Secretary, Alfred D. Cole; Anthony Zeleny, 

 1 year; T. C. Mendenhall, 2 years; Dayton C. 

 MiUer, 3 years; George W. Stewart, 4 years; 



