1. Biology Department, Kansas State Teachers College, Emporia, Kansas.
2. Plant Pathologists, Forest Products Laboratory, Forest Service, U. S. Department of Agriculture, maintained at Madison, Wis., in cooperation with the University of Wisconsin.
3. Institute of Parasitology, Czechoslovak Academy of Sciences, Prague, Czechoslovakia.
4. Pacific Northwest Forest and Range Experiment Station, U. S. Forest Service, Forestry Sciences Laboratory, Corvallis, Oregon
5. Inst. Nac. de Investigaciones Forestales, Coyoacan, Mexico, D. F.
6. Department of Bacteriology, Walter Reed Army Institute of Research, Washington, D. C. (Lt. Col., MSC, USA.
7. Department of Botany, University of Wisconsin, Madison, Wisconsin.
8. Department of Plant Pathology, University of California, Riverside.
9. Department of Mycology, Southwest Foundation for Research and Education, San Antonio, Texas.
10. Department of Botany, University of Kansas, Lawrence, Kansas.