82 FISHERY INDUSTRIES OF THE UNITED STATES. 
nected with the front of the pot. As soon as the fish have entered, 
the men pull the front up with these lines. The bottom of the pound 
is then lifted so that the fish can be removed with dip nets. 
Wheels.—Wheels are of two kinds, movable and stationary. Two 
of the latter kind were fished in the Columbia River off Pacific County. 
The catch was unimportant, amounting in 1915 to only 5,234 pounds, 
with a value of $211. 
Dredges, tongs, rakes, hoes, etc.—The dredge is the only one of these 
apparatus used both in the vessel and shore fisheries. Out of a 
total catch of 1,740,609 pounds, valued at $468,006, 1,227,315 pounds, 
valued at $433,985, were taken inshore, and the remainder in the ves- 
sel fisheries. Compared with the catch by the same apparatus in 
1904, there was a decrease of 525,920 pounds and an increase of 
$2,132. The loss of weight was mainly in native oysters. 
Dredges are used exclusively in taking oysters and are similar to 
those used in the east for this purpose. Tongs, rakes, and hoes are 
also used for taking oysters. Both hoes and forks are used in catching 
hard clams, but shovels only are used for razor clams. The few 
mussels shown were taken with the oysters. 
