212 BULLETIN OF THE UNITED STATES FISH COMMISSION. 



sink deeper into the water, and tliat the foot of the hidder may contain 

 more water; 



(2.) To increase the height of the opening w, which is only IC centi- 

 meters, to 25 centimeters, because otherwise a large salmon cannot slip 

 through below ; and 



(3.) To place the diverging walls on the weir v v somewhat wider 

 apart at the upper end, or, in other words, to make the opening w to 

 somewhat longer, so as to get more water into the ladder and make it 

 easier for the fish to ascend. 



NOTE ON PINTSCH'S MOVABLE SALMON LADDER, BY E. B. MARSTON. 



In a recent account of salmon fishing in Scotland, I referred to the 

 dams on the river Don in Aberdeenshire as preventing the ascent of 

 salmon, except in high waters. Being of opinion that there is often not 

 much good done by merely describing a disease unless you can also 

 suggest a remedy, I said if any of my Aberdeenshire readers desired 

 it I would give some account of the McDonald fish way. Several gen- 

 tlemen asked me to do so. Now the only objection that I could think of 

 as likely to be raised against the McDonald pass was its expense, which 

 would probably be very high. But in the German Fischerei-Zeitung 

 of April 22, I find an account of a movable ladder invented by Anton 

 Piutsch, forest-officer of Kurczyn, in Hungary. This ladder is fully 

 described in the German Gazette by Dr. M. Nowicki, of Cracow, and it 

 seems to me to be in every way well worthy of trial in this country. 



It seems to me that we are much indebted to Mr. Piutsch for invent- 

 ing, and Dr. Nowicki for describing, such a very i)ractical and ex- 

 tremely cheap salmon ladder. It can hardly fiiil to succeed if used on 

 such rivers as the Don in Aberdeenshire, at the horrible weir at Arma- 

 thwaite on the Eden, at Totnes weir on the Dart, and other similar 

 places where, except in heavy waters, salmon cannot pass up stream. 



Fishing Gazette, Mmj 24, 1884. 



113 TKAIVSFERRIIVG CATFISH FROM THE POTOMAC TO THE COIj- 



ORADO RIVER, ARIZOx\A. 



By MARSHALL, McOONALD. 



* 



One hundred catfish were sent to Arizona with the recent shipment 

 of 1,000,000 shad for the Colorado Eiver. Of these 10 reached destina- 

 tion and were delivered to Commissioner Gosper, at Prescott, Arizona, 

 who will deposit them in the Colorado River. 



United States Fish Commission, 



Division of Distribution, June 28, 1884. 



