ra 
| 
Plate I. 
| 
al 
oe —— --- 
eT 
eg ee Os eS oy 
ih 
/ 
; 
V 
/, wyytyy ‘ 
| 
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| 
| 
| 
| 
| 
| 
| 
| 
| 
| 
| 
~ OT 
{@ 
i 
| 
| 
i 
| 
| 
| 
| 
| 
Ll 
Bulletin 14, Division of Entomology, Dept. Agr. 
PRINCIPLES OF THE SERRELL AUTOMATIC REEL. 
