86 



EEPORT OF COMMISSIONER OF FISH AND FISHERIES. 



[84] 



WING NETS. 



Various forms of nets have been used to collect minute specimens at 

 intermediate depths, but Capt. H. 0. Chester was the first, I believe, to 

 attach the net to the trawl frame. This he did by hanging a small 

 cheese-cloth net to a piece of iron pipe, one end of which was inserted in 



I 



Fig. 19. — Chester's wiug uet. 



the trawl beam, and held in place by a set screw. The iron pipe a has a 

 ring e at its outer end to prevent the arms c c from slipping off. The 

 arms, the frame 6, and the net d are suspended from the pipe which is 

 iuserted into the end of the trawl beam at/. The arms swing freely on 

 the pipe. 



DIMENSIONS. 



Iron pipe, a, lenyth, .3 feet. 



Iron pipe, a, diameter, 2 inches. 



Iron cap, e, length, 1 inch. 



Iron cap, e, diameter, 2^ inches. 



Frame, length, 2 feet. 



Frame, width, 8 inches. 



Frame, diameter, round iron, ^ inch. 



Arms, length, 6 inches. 



Arms, diameter, round iron, | inch. 



Bag, length, 2 feet. 



Bag, size of mesh, square, -i\ inch. 



Bag, material, cotton, 3-thread. 



Bag, bottom-lining, cheese-cloth. 



Subsequently the bottom lining was discarded and an ordinary sur- 

 face towing net inserted, the ring seized to the sides. of the uet d. This 

 net has proved a valuable adjunct to the tx^awl. 



