xii Proceedings of the Biological Society of Washington. 



Formal communication: W. E. Ritter, The usefulness and the 

 peril of the laboratory method in biology. 



May 13, 1922— 641st Meeting.' 



President Bailey in the chair; 74 persons present. 



New member elected: M. N. Pope. 



Informal communications: David White, Exhibition of a fossil 

 frog or toad; J. M. Aldrich, Note on the occurrence of dipterous 

 larvae in shales of Green River, Utah; Miss P. L. Boone, Report 

 of a visit to C. T. Simpson; A. Wetmore, Unusual bird songs; 

 V. Bailey, Exhibition of pet rodents; L. O. Howard, A mouse 

 plague in Italy since the war; E. A. Goldman, A mouse plague 

 in France. 



Formal communication: T. S. Palmer, Twenty years of Federal 

 protection of the buffalo. 



September 29, 1922— Special Meeting. ^ 



President Bailey in the chair; 240 persons present. 

 Formal communication: D. R. Dickey, Exhibition of moving 

 pictures of game animals of New Brunswick. 



October 19, 1922— Special Meeting. ^ 



Joint meeting with the Washington Academy of Sciences and 

 the Chemical Society of Washington. President W. J. Hum- 

 phreys of the Washington Academy of Sciences in the chair, and 

 94 persons present. 



Program: Dr. H. J. Hamburger, Professor of Physiology in 

 the University of Groeningen, Holland, The increasing sig- 

 nificance of chemistry in medical thought and practice. 



November 11, 1922— 642d Meeting.^ 



President Bailey in the chair; 75 persons present. 



Formal communications: E. D. Ball, Importance of adequate 

 training for biological work in government service; G. N. Collins, 

 Maize and its wild relatives; N. A. Cobb, Nematodes inhabiting 

 trees. 



November 25, 1922— 643d Meeting.^ 



Vice-President A. S. Hitchcock in the chair; 76 persons 

 present. 



lAbatract in Journ. Washington Acad. Sci., vol. 12, p. 333-335, August 19, 1922. 

 ^Abstract to appear in Journ. Washington Acad. Sci. 



