Bui. 80, U. S. Dept. of Agriculture. 
Plate II. 
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Fibers of an Over-Cooked Pulp Produced with a Large Amount of Caustic 
Soda. (Cook 4.) Magnified 65 Diameters. 
Partial disintegration has taken place. The fibers are fragmentary and contorted Avith rather 
weak cell walls. The vessels with barely visible markings are on the point of being 
eliminated. 
