DECEMBER 9, 1905. Scientific American 463 ing room is provided with a trapdoor, through which $1,000 in a day. Advantage is taken of localities where fish is built on the river side of the wheel, so that the the refuse is dropped into the river. points jut out into the river, the wheel being set at… … certain directions. can be raised and As it is, however, lowered, and thus the run of the adjusted to the salmon has been depth of water. decreasing from The scow is an- year to year, and chored or moored is now of small to the shore, with proportions com- the wheel end pared with the projecting…
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