Bull. U. S. B. F., 1917-18. 



Plate XLIV. 



Fig. I. — Poor cutting due to want of care pr lackof experience. Note poor spacing, overlapping of blanks, and exposed margins of shell, 



indicating that blanks were pushed out. (See p. 87.) 



Fig. 2.— Illustrating careful, methodical cutting. (See p. 87.) 



