86 



REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



WING NETS. 



[84] 



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

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

 attach the uet 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 



Fig. 19. — Chester's wing net. 



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 b, and the net d are suspended from the pipe which is 

 inserted iuto the eud of the trawl beam at/. The arms swing freely on 

 the pipe. 



DIMENSIONS. 



Iron pipe, a, length, il 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, rouud iron, £ inch. 



Arms, length, (J inches. 



Arms, diameter, round iron, J inch. 



Bag, length, 2 feet. 



Bag, size of mesh, square, f^ 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 trawl. 



