Buu. U.S. B. F., 1917-18. 
Fic. 1.—Poor cutting due to want of care or lack of experience. Note poor spacing, overlapping of blanks, and exposed margins of shell, 
indicating that blanks were pushed out. (See p. 87.) 
Fic. 2.—Illustrating careful, methodical cutting, (See p. 87.) 
