480 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [44] 



commonly used on argand burners. The holes in the lower diaphragm 

 are made with flanges so that the glass tubes can rest upon them. 

 When in use, the eight tubes around the side of the bucket haveiheir 

 lower ends covered with cheese cloth, so that, while the escape of eggs 

 will be prevented, there is no hindrance to the proper circulation of 

 water. In the center of the bucket is placed an automatic syphon 

 so arranged that when it is conuected with a hose bringing water into 

 the bucket, it will break the flow when it has reached a certain height, 

 and will thus cause a regular ebb and flow motion, or " tide motion," as 

 it is commonly called. 



The bucket is located in the laboratory of the Grampus, and is con- 

 nected by rubber hose with the well, from which an ample supply of 

 water is obtained, while the surplus water is carried by another hose 

 into the bilge of the vessel and taken out with the bilge pumps. 



When floating eggs are obtained, one or more buckets are put in oper- 

 ation, and the eggs are immediately transferred into the glass tubes. 

 They can be kept in a condition of development until the vessel 

 reaches one of the coast stations, when the eggs are put into hatching- 

 troughs on shore. 



The buckets used are 10 inches high, 13 inches in diameter at the top, 

 and about llf inches diameter at the bottom, the staves being three- 

 quarters of an inch thick. They are coated on the inside with asphaltum. 



31. MISCELLANEOUS MATERIAL. 



Buckets, wooden, (6). 

 Dippers, tin (3). 

 Hatching-jars, Chester's (4). 



Pans, tin (6). 



Tubs, wash, wooden (3). 



Tubes, brass (1). 



I.— METHODS OF FISHING, DREDGING, ETC. 



32. FOR LIVE CODFISH. 



As has been mentioned, an important part of the work performed 

 by the Grampus is the collection of living gravid cod, pollock, and other 

 species of Gadidce for the marine hatcheries on the New England coast. 

 The season extends from October to May, and the method of fishing 

 varies with season and species. 



The grounds resorted to are chiefly about No Man's Land, on Nan- 

 tucket shoals, and off Gloucester, in Massachusetts Bay. Sometimes 

 the cod grounds in Ipswich Bay and on the shoal grounds east of Cape 

 Ann are visited. 



a. Hand-line fishing. 



In the fall the cod which gather on the grounds near No Man's Land, 

 to the south and east of Nantucket, and on the small rocky patches in 

 Massachusetts Bay, can most readily be taken with hand-lines. The 



