January 17, 1919] 



SCIENCE 



75 



spondenoe between the swiftness of the motion 

 and the intensity of the impinging beam. 

 Again, the molecular radiometer, in which the 

 thermal gradient is at the same time a pres- 

 sure gradient would fall under the same ob- 

 jections. I can only conclude vaguely, there- 

 fore that in some way the local vortices evoked 

 by thermal distribution resolve themselves into 

 a pei-sistent ordered rotation- of the cylinder of 

 liquid around its vertical axis, with the regres- 

 sive motion specified confined to one or two 

 relatively thin layers. 



Carl B.\rus 

 Brown Univeesity, 

 Providence, E. I. 



AMERICAN SOCIETY OF NATURALISTS 



The thirty-sixth annual meeting of the American 

 Society of Naturalists was held at Johns Hop- 

 kins University, Baltimore, December 28, 1918, 

 Vice-president Guy N. Collins in the chair. In 

 affiliation with the society at this meeting were the 

 American Society of Zoologists and the Botanical 

 Society of America. 



Illness having prevented the attendance of the 

 treasurer the auditing committee was flirected to 

 examine his books and report at the next meeting 

 of the society. 



The executive committee recommended that sec- 

 tions 1 and 2 of article III. of the constitution be 

 changed to read as follows: 



Article III., Section 1. The officers of the so- 

 ciety shall be a president, a vice-president, a sec- 

 retary and a treasurer. These, together with three 

 past-presidents and the retiring vice-president, 

 shall constitute the executive committee of the so- 

 ciety. 



Article III., Section 2. The president and vice- 

 president shall be elected for a term of one yer.r, 

 the secretary and treasurer for a term of three 

 years. Each president on retirement shall serve on 

 the executive committee for three years. Each 

 vice-president on retirement shall serve on the ex- 

 ecutive committee for one year. The election of 

 officers shall take place at the annual meeting of 



= In other words, the conditions of hydrostatic 

 equilibrium imply an inclined surface of the liquid 

 with its maximum head in the region of the il- 

 luminated part. But such a structure is gra^-ita- 

 tionally unstable. It is difficult to see, however, 

 why the flow should be an orderly rotation of 

 nearly the whole cylinder of liquid. 



the society, and their official term shall commence 

 at the close of the meeting at which they are 

 elected. 



This recommendation was referred back to the 

 executive committee by the society with the sug- 

 gestion that they consider further the form by 

 which continuity of policy may best be attained. 

 There were elected to membership: William T. 

 Bovie, Harvard Medical School; Walter B. Can- 

 non, Harvard Medical School; Otto Glaser, Uni- 

 versity of 'Michigan; Donald F. Jones, Connecticut 

 Agricultural Experiment Station; Lewis E. Jones, 

 University of Wisconsin; Horatio H. Newman, 

 University of Chicago; Victor E. Shelf ord. Univer- 

 sity of Illinois; Theobald Smith, Eockefeller In- 

 stitute; Alonzo E. Taylor, University of Pennsyl- 

 vania; Edgar N. Transeau, Ohio State University. 



The following program was presented : 

 Parthenogenesis and sex determination in the 



white fly : A. F. Shull and N. E. Stoll. 

 The evolution of nuclear conditions in Ciliata: M. 



M. Metcalp. 

 The genetic interrelations of two dwarf perfect- 

 flowered types of maise: E. A. Emerson and S. 

 H. Emerson. (Eead by title.) 

 Crossing-over and allelomorphism in the grouse lo- 

 custs: E. K. Nabours. 

 The evidence in favor of a linear order of the 



genes: T. H. Morgan. 

 Seversal of dominance in a meal-moth producing 



some new phenotypic ratios: P. W. Whiting. 

 The globe mutation in Datura: A. F. Blakeslee. 

 Some factors in growth correlations: E. W. Six- 



NOTT. 



On some growth-changes in the body-form of Mel- 



lita: W. J. Crozier. (Read by title.) 

 The effects of inbreeding on guinea-pigs : Sewall 



Wright. 

 Quantitative relations between chromatin and 

 cytoplasm in the gentis Arcella, with their rela- 

 tions to external characters: E. W. Heqner. 

 (Eead by title.) 



The Naturalists' dinner was held on the evening 

 of December 28 at the Hotel Emerson with sixty- 

 five in attendance. Following the dinner Professor 

 A. O. Lovejoy led a round table discussion by mem- 

 bers of the American Association of University 

 Professors of the work of certain of its committees. 

 The officers of the society for 1919 are: 

 President — Edward M. East, Harvard University. 

 Vice-president — John H. Gerould, Dartmouth 

 College. 



Secretary — Bradley M. Davis, University of 

 Pennsylvania (1917-19). 



