272 EEPORT OF COMMISSIONER OF FISH AND FISHERIES. 



Here the leader is generally made of brush, up to the height of half- 

 tide, and of netting the rest of the way. The heart is made of either 

 brush or netting, aud sometimes of slats. The bowl, instead of being 

 placed at the outside of the heart, 

 in a line with the leader/is placed 

 either in the upper or lower side, 



Slat Weir JEastDenniSjUKTass. Bay. 

 Cait. ZPjjdtce Crowilx. 



ZBrusrL~Weir. 



Deep Water Weir ibz taking Salmon, 

 Shad&c: "built into -IS to 20 feet of water. 

 The pocket has a Doara.ftoor,lait]_so that 

 it is dry at lovr "water for convenience of 

 taking the fish. 



according to the nature of the coast, in some localities the efficiency 

 being greater in the one case, while it is reversed in the other. The 

 bowl may consist of netting or of slats, and the two forms are illustrated 

 in the accompanying figures. 



An ingenious apparatus, according to Perley, called the " spring- weir," 

 is made use of in certain parts of the bay, where there is a very narrow 

 entrance to a harbor, easily capable of being closed. This is so arranged 

 as to drop flat to the bottom at low water, and allow the fish to pass over 

 it with the incoming tide. At high water this is lifted up and worked 

 from the shore by means of powerful capstans and ropes, forming an im- 

 passable barrier to the fish, which are retained as the tide passes out, 

 and taken in large numbers, including shad, herring, salmon, &c. 



