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A fishway, to be successful, must be one that can be 
applied to all forms of dams and natural falls, one that 
will provide a slow, natural stream at all heights of 
water, with the entrance for the fish close to the 
obstruction and placed where they will readily find it, 
and one which will not injure the water power on the 
smallest stream. But after such a device has been 
produced, much experience in the location and con- 
struction is necessary, or failure is almost sure to fol- 
low; because almost all dams and falls have difficulties 
to be overcome, entirely their own, which must be met 
by the proper application of the fishway to the obstruc- 
tion. To employ an inexperienced man to do this 
work, is to invite failure in a great majority of cases. 
Large sums of money have been lost by the adoption 
of such mistaken methods to master difficulties which 
only an expert can accomplish, and such is the nature 
of the obstacles to be overcome, that even a man of 
experience may sometimes make fatal mistakes. 
So far as a decision of the merits of any form of 
fishways is concerned, the proofs must be supplied by 
the fish themselves, in the rivers at the dams, for gold 
medals and other prizes given at expositions and world’s 
fairs are liable to be awarded upon theoretical devices 
which too often fail when put to actual test. 
In this as in most other cases, an ounce of fact is 
worth more than a pound of theory. 
The Rogers’ Fishway, which is now in_ successful 
operation on many dams and falls in Canada as well 
as in this country, fully and completely meets all the 
foregoing conditions and requirements. Its width, five 
feet; depth, two to three feet; form of internal con- 
struction and resultant, slow and unbroken stream, are 
each and all indispensible in a successful fishery; in 
these respects it is different from any other in use on 
either side of the Atlantic and can be constructed at 
moderate cost so as to successfully pass any sort of 
