54 AmeHcan Fisheries Society 



the momentum, but this is overcome in the Perfect Fish 

 Pass. 



(3) No ice or floods can damage it or interfere with 

 it, and why? Because it is not there when the ice forms 

 and when the freshets and floods pour down. Fish do 

 not ascend streams after the ice forms, hence this new 

 fish pass has been made portable. It is taken to pieces 

 and removed for storage during the winter, as during 

 that season it is of no use on the river. I asked a famous 

 writer on fish passes how many months per year salmon, 

 in his opinion, would use a fish pass, and he said "four 

 months cover the main period," yet for four months 

 actual use, fish passes are in position for twelve months, 

 but the Perfect Fish Pass is so constructed and pieced 

 together by strong brass bolts, etc., that it can easily 

 be taken away in a few hours, and thus runs no risk 

 of damage in winter or early spring. Salmon may 

 ascend, for example, from June to November, but the 

 most important run is during four months, say, July, 

 August, September and October. The fish pass is in posi- 

 tion and available then, and the few fish, before or after 

 that period, can be neglected. These few fish must come 

 up next year. "Too late, too late," the Perfect Fish 

 Pass seems to say, "Ye cannot enter now, but you can 

 come again next summer." The salmon supply for the 

 future in any river is secure, I claim, if the main run 

 are enabled to ascend during the period referred to. 



One point before I close : It was my intention to place 

 freely at the disposal of the Canadian Government this 

 new device; but the official attitude assumed at head- 

 quarters questioning the granting of any authority to 

 erect the first fishway on this new principle caused me 

 to change my mind and in justice to Professor Knight, 

 and in the interest of an engineer who aided me on some 

 technical points I completed steps to protect it by patent. 

 Such protection has been granted in Canada and has 

 been applied for in the United States so that my fishway 

 is not only as I hoped and claimed, entitled to be called 

 "A Perfect Fish Pass," but it is what I had not originally 

 intended or claimed, it is a Patent Fish Pass. 



