1048 



BULLETIN OF THE BUREAU OF FISHERIES. 



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Fig. II. — Atkins. 



Under system i may be reckoned also the fishways for young eels, which 

 consist merely of an inclined pipe from 4 to 6 inches in diameter, or a narrow 

 flume, which is filled with loose gravel and pebbles, with fascines of brush and 

 saplings, or with a mixture of both, through which the young eels can readily 

 pass. 



II. THE POOL AND FALL, OR STEP SYSTEM. 



Figures 12 to 14 show the current carried down an incline broken by steps 

 into a number of pools of relatively still water. 



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Fig. 12. — Richardson 



