Miscellaneous. 



319 



with a rise of one in six, which is quite steep, would 

 have the way extend 36 feet down stream it will be 

 seen how easily fish might go past it, and that is a mod- 

 erately steep gradient, if possible make it one in ten. 

 With dams alternately projecting from each side, as 

 shown, the force of the water is broken and eddies are 

 formed which permit the fish to rush, rest, and so as- 

 cend. There are more complicated forms of fishways, 

 some patented, but for a little trout stream this simple 

 form will do. 



If it is desirable to stop all kinds of fish from ascend- 



FORMS OF FISHWAYS. 



ing, a trap at the top can be arranged and the fish as- 

 sorted. Some figures of different devices are here 

 given. Those who wish to pursue the subject further 

 are referred to the Reports of the U. S. and State Fish 

 Commissions. The McDonald fishway as he patent- 

 ed it but did not invent it the name is legitimate I 

 believe to be the best form if properly built and pro- 

 tected. It is too complicated for small ways such as 



