North American Fruit Explorers mailing list at ibiblio

["Erdman, Jim" <ErdmanJ@uwstout.edu>]

I think that the key to the original suggestion may be that they were frozen 
in blocks of ice.  That would prevent freezer burn, moderate the temperature, 
and maintain some moisture, as long as the scions were covered with ice.  
 
Jim Erdman, in Menomonie, WI