RIVER FISHERIES. 83 



New Hampshire has completed the work on this 

 river, by putting ways on all the important dams 

 within her borders ; and the experiments there have 

 fixed the conclusion that " Foster's fishway," des- 

 cribed and figured in the last Report, is by far the 

 cheapest, simplest, and most effective of those now 

 known. It is only where the space is limited that 

 the box-way, or double stair, like that at Lowell, is 

 desirable.* 



The salmon ova planted last autumn in the Pemige- 

 wasset, by order of the New Hampshire Commis- 

 sioners, are thought to have done well, and the young 

 parrs have been seen this autumn by Dr. William W. 

 Fletcher, of Concord, who has had this service in 

 charge, and who has successfully hatched and raised 

 a number of parrs in a little spring near his house. 

 Dr. Fletcher is just back from an expedition after 

 salmon ova to New Brunswick. 



As to the great Hadley Falls dam on the Con- 

 necticut, it is true that the 10,000 dollars actually 

 voted for restocking rivers and ponds might, in part, 

 be applied to making a fishway under the plea that 

 this was among " appliances and structures useful for 

 the passage ot the fish." But then this sum would 

 not be enough. In their Report of last year (page 3,) 

 the Commissioners stated that 10,000 dollars was a 

 minimum estimate for this fishway ; and subsequent 

 examinations have tended to raise this estimate to 



* On the Susquehanna, at Columbia, Col. James Worrell has 

 made a fishway by cutting a section forty feet long out of the dam, 

 down to a level somewhat below that of the water underneath the 

 dam. Beginning at this, at its lowest point, an inclined plane with 

 sides (in other words, a trough) is constructed up stream, in and 

 beyond the thickness of the dam. Through this what may be 

 termed reversed fishway the shad passed last spring in numbers, 

 and, for the first time in nearly thirty years, were seen fifty miles, 

 above on this river and the Juniata. The result shows that shad not 

 only return to their place of birth, but will, when occasion offers, 

 penetrate beyond it. 



