1. U. S. Department of Agriculture, Forest Service, Center for Forest Mycology Research, Forest Products Laboratory, Madison, Wisconsin 53705
2. Department of Forestry, Michigan Technological University, Houghton, Michigan 49931
3. U. S. Department of Agriculture, Forest Service, Forestry Sciences Laboratory, Missoula, Montana 59801
4. U. S. Department of Agriculture, Forest Service, Improvements in Drying Technology, Forest Products Laboratory, Madison, Wisconsin 53705