The American Genetic Association 



Pruident. DAVID FAIRCHILD Vice-Pretident. W E. CASTLE Aeting Secretary 8EWALL WRIGHT 



Treantrer, BOYD TAYLOR 



Editorial Board: 

 T. H. KEARNEY C. E. LEIGHTY GEO. M. DARROW 



WILSON POPENOE R. R. GRAVES PAUL POPENOE 



Members of the Council are ex-officio members of the Editorial Board. 



Managing Editor: R. C. COOK 



Buainets Manager: MRS. ¥. D. LUMSDEN 



COUNCIL 



W. E. CASTLE, Professor of Zoology, Harvard University, and Research Associate of the Carnegie Institution of Washington. 

 G. N. COLLINS, Botanist. Bureau of Plant Industry, U. S. Department of Agriculture, Washington, D. C. 

 F. COOK. Bionomist in Charge of Office of Crop Acclimatization, U. S. Department of Agriculture, Washington, D. C. 

 DAVID FAIRCHILD, Agricaltural Explorer in Charge of Foreign Seed and Plant Introduction. Bureau of Plant Industry. 



U. S. Department of Agriculture, Washington, D. C. 

 GILBERT GROSVENOR. Pre,=ident National Geographic Society, Washington, D. C. 

 J. H. KEMPTON, Bureau of Plant Industry, U. S. Department of Agriculture, Washington. D. C 

 FREDERICK ADAMS WOODS, Lecturer on Biology, Massachusetts Institute of Technology. 

 SEWALL WRIGHT, Senior Animal Husbandman in Animal Genetics. U S. Department of Agriculture Washington D C 



ADVISORY COMMITTEE 



W S. ANDERSON, Genetics Department, University of Kentucky, Lexington, Kentucky. 



E. B. BABCOCK, Genetics Department, University of California, Berkeley, California. 



E. A. BESSEY, Professor of Botany, Michigan Agricultural College, East Lansing, Michigan. 



A. F. BLAKESLEE, Plant Genetics, Carnegie Institution of Washington, Cold Spring Harbor, L I , N. Y 



J. K. BREITENBECHER, Professor of Zoology, University of Oklahoma. Norman, Oklahoma. 



W. E. BRYAN, Professor of Plant Breeding, University of Arizona, Tucson, Arizona. 



LEON J. COLE, Department of Genetics, University of Wisconsin, Madison, Wisconsin. 



C. B. DAVENPORT, Director, Dept. of Genetics, Carnegie Institution of Washington, Cold Spring Harbor, L I., N. Y 



J. A. DETLEFSEN, Chief in Genetics, University of Illinois, Urbana, Dlinois. 



RUSSELL W. DUCK, Professor of Animal Husbandry, Syracuse University, Syracuse, New York. 



E. M. EAST, Professor of Plant Genetics, Bussey Inst, of Applied Biology, Harvard University, Boston, Mass. 

 R. A. EMERSON, Professor of Plant Breeding, Cornell University, Ithaca, New York. 



C. P. GILLETTE, President, The Genetic Foundation, Fort Collins, Colorado. 

 FREDERICK 0. GROVER, Professor of Botany, Oberlin CoUege, Oberlin Ohio. 



ROBERT T. HANCE. Professor of Genetics, North Dakota Agr'l College, Agricultural CoUege.North Dakota 



HARRISON R. HUNT, Professor of Biology, University of Mississippi, Oxford, Mississippi 



R. E. HUNT, Professor of Animal Husbandry, Virginia Polytechnic Institute, Blacksburg, Virginia. 



D. F. JONES, Plant Breeder, Connecticut .Agricultural Experiment Station, New Haven, Connecticut. 



F. B. LINFIELD, Director, Montana Experiment Station, Bozeman, Montana. 



WM. A. LIPPINCOTT, Professor of Poultry Husbandry, Kansas State Agricultural College, Manhattan. Kansas 



C. C LITTLE, President, University of Maine. Orono, Maine. 



JAY L. LUSH, Animal Husbandman, Texas Agricultural Experiment Station, College Station, Texas. 



H. H. NEWMAN, Professor of Zoology, University of Chicago, Chicago, Illinois. 



T. S. PALMER, Expert in Game Conservation, U. S. Department of Agriculture, Washington, D C. 



MRS. CHARLES C. RUMSEY, Wheatley Hills, Westbury, Long Island. 



THOMAS W. SALMON, Professor of Psychiatry, Columbia University, New York City. 



JOHN M. SCOTT, Vice Director, Florida Agricultural Experiment Station, University of Florida, Gainesville, Florida 



JOHN W. SCOTT, Professor of Zoology, University of Wyoming, Laramie, Wyoming. 



A. D. SHAMEL, Pomologist, U. S. Department of Agriculture, Riverside, California. 



GEORGE H. SHULL, Professor of Biology, Princeton University, Princeton, New Jersey. 



W. W. SMITH, Professor of Animal Husbandry, Purdue University, Lafayette, Indiana. 



CHARLES R. STOCKARD, Professor of Anatomy, Cornell University, Medical College, New York City 



A. B. STOUT, New York Botanical Gardens, Bronx, New York City, 



W T. SWINGLE, Plant Physiologist in Charge of Breeding Investigations, U. S. Dept. of Agric , Washington, D. 0. 



E. L. THORNDIKIE, Professor of Educational Psychology, Columbia University, New York City. 



L. H. TOMHAVE, Head of Department of Animal Husbandry, Pean. State College, State College, Pennsylvania. 



H. E. WALTER, Associate Professor of Biology, Brown University, Providence, Rhode Island. 



H. J. WEBBER, Director, Citrus Experiment Station, Riverside, California. 



EDWARD N. WENTWORTH, Armour's Bureau of Agr'l Research and Economics, Union Stock Yards, Chicago. Illinois. 



P. W. WHITING, Child Welfare Research Station, University of Iowa Iowa City, Iowa. 



JOHN A. WIDTSOE, 47 E. South Temple St., Salt Lake City, Utah. (Formerly President of Utah Agricultural College.) 



