Bui. 80, U. S. Dept of Agriculture. 



Plate VII. 



Fibers of an Under-Cooked Pulp Produced with a Small Amount of Caustic 

 Soda. (Cook 9.) Magnified 65 Diameters. 



Note the vessels with well-defined marking-sand the ray cells holding together a group <>f fibers 



constituting a shive. 



