es - 
PLATE ITI. 
Report U.S. F. C. 1880.—Verrill. Dredging Apparatus. 
Hf 
a SS 
a a (anes — EEE lk ee ite — 
: S ALE x 
Fic. 8.—The Towing-net in use. 
Fic. 9.—The Check-stop. 
ryzaeuerameani 
EF 
AH mmasasistscerencse saat / 
Fic. 11.—The Cradle-sieve, end view. 
Fic. 10.—The Cradle-sieve. 
