. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 142 CALIFORNIA PISH AND GAME Number. Pounds. 500 Rainbow trout approximately 4 lbs. each 2,000 100 Rainbow trout approximately 3 lbs. each 300 1,400 Rainbow trout approximately 2 lbs. each 2,800 435 Rainbow trout approximately i lb. each 109 2,435 5,209 Tho fish were stranded in two large liolos below the Concow Dam which had been emptied to clean the lake. Great difficulty was encountered in removing large boulders so that the ponds
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 142 CALIFORNIA PISH AND GAME Number. Pounds. 500 Rainbow trout approximately 4 lbs. each 2,000 100 Rainbow trout approximately 3 lbs. each 300 1,400 Rainbow trout approximately 2 lbs. each 2,800 435 Rainbow trout approximately i lb. each 109 2,435 5,209 Tho fish were stranded in two large liolos below the Concow Dam which had been emptied to clean the lake. Great difficulty was encountered in removing large boulders so that the ponds could be netted. The fish were then raised 130 feet over the dam in cans with the loss of but one fish. This device is designed to remove all floating trash from irrigation canals and also to prevent the entrance of fish into such conduits. Its motive power is derived from a current water wheel and as its mechanism is geared to run slowly, it has great power. This enables the machine to re- move with ease large objects from the stream in which it operates. Two men have been placed on the teeth that carry the trash from the water and at the same time men have stood on the cross bars of the carrier and this weight has not noticeably slowed down the speed of the Fig. 4 6. A new type of self-cleanin,t? lish screen invented by Francis Cuttle of Riverside, Calif. A circle of revolving teeth carry the trash on to a carrier which in turn deposits it in a pile at the side of the screen. These trout would have become a total loss if allowed to remain as there was no stream flow.—George Nealc. SELF-CLEANING FISH SCREEN A recent invention by Francis Cuttle of Kiverside, originally designed for the removal of trash from canals is also an effective fish screen and meets an objec- tion most often heard against their in- stallation by divertors and users of water. Self-cleaning, parallel bar screens have been in use for many years in different forms. The screen is described as fol
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