Acknowledgments 



This study of avian hematology was initiated in 1944 and has received help 

 and encouragement from many sources. We want to express our deepest 

 appreciation in particular to the institutions and persons listed below for 

 the contributions indicated: 



Live birds: Dr. Donald W. Douglass, Dr. Lawrence Fay, Mr. Herbert J. 

 Miller, Mr. Roy Hunt, and Mr. Martin Pollok, all in the Michigan Depart- 

 ment of Conservation; Dr. M. R. Irwin, Department of Genetics, University 

 of Wisconsin, Madison, Wis. ; Dr. Charles C. Sheppard, Poultry Department, 

 Michigan State University, East Lansing, Mich.; and Mr. A. G. Lohman, 

 Manager Hamilton Farm Bureau Cooperative, Lie, Hamilton, Mich. 



Slides: Dr. John W. Gowen and Miss Janice Stadler, Department of 

 Genetics, Iowa State College, Ames, Iowa; Dr. Wade M. Smith, Jr., and Miss 

 Enid B. Allbaugh, Hy-Line Poultry Farms, Des Moines, Iowa; Dr. E. N. 

 Moore, Poultry Science Department, Ohio Agricultural Experiment Station, 

 Wooster, Ohio; and Dr. George W. Sciple, Bear River Research Station, 

 Brigham City, Utah. 



The library work was greatly facilitated by the many courtesies extended 

 by the staff of the Medical Library, University of Michigan, Ann Arbor, Mich. 



The authors appreciate the help given to the project by all members of 

 this Laboratory. Those most directly concerned were: Mr. Berley Winton, 

 Director; Mrs. Hazel W. Garrison, secretary; Mr. Seymour Albert; Mrs. 

 M. Gay Flokstra, Mrs. Isabelle M. Letts, Mrs. Georgiann S. McClure, Mrs. 

 Ellen Reibeling, and Mrs. Carolyn Tull, technicians; Mrs. Anne C. Garrison, 

 translator; and Mrs. Coletta S. Waggoner, librarian. 



To Swift & Co., Chicago, 111., we want to express our sincere appreciation 

 for its generous financial support of this research through grants to Michigan 

 State University. Dr. 0. A. Newton, who represented the Company, fully 

 appreciated the significance of the research and consistently encouraged its 

 execution. 



We also desire to express to Michigan State University our thanks for 

 administering the research grants made by Swift & Co. 



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