Bul. 224, U. S. Dept. of Agriculture. PLATE il. 
Fia. 1.—EDGE OF WASHED TUMBLER 
(C HOUSE). 
Fic. 2.—FINGER TIPS OF BREAKER 
(C HOUSE). 
Fic. 3.—WASHED FINGER TIPS AFTER 
CRUSHING TANNERS’ EGG. 
G HOUSE: 
