6 DREDGING AND HYDROGRAPHIC RECORDS OF 



In the double column of "Drift" is shown approximately the gen- 

 eral direction in which the gear was hauled as well as the distance. 

 The state of tlie currents and of the wind, with the exigencies incident 

 to the steering of the ship, make this more or less inaccurate. 



The apparatus used consisted of the usual beam trawls and tangle 

 swabs for all work on the bottom. All intermediate and surface 

 work was done with a large tow net and three small plankton or 

 Kofoid nets. The large net is known as "intermediate 3," and was 

 usually rigged with two Kofoid nets, one at each side, when used for 

 intermediate work, being lowered from the dredging boom on the 

 starboard side. When used for surface work in the evening, it was 

 lowered from the lower boom on the port side, the small plankton 

 nets not being attached but towed astern from the taffrail, on two 

 separate lines about 10 feet apart. The cod-lines were used several 

 times on fishing banks. 



ABBREVIATIONS AND SYMBOLS. 



8' Agassiz The 8-foot Agassiz beam trawl. The Agassiz type of beam trawl was 



used more and with l)etter results than any other used during the 

 cruise. 



8'A11).-Blk 8-foot Albatross-Blake beam trawl. The 8 and 9 foot Albatross- 

 Blake beam trawls were used a few times during the cruise. 



B. A British Admiralty. 



botm bottom. 



C. S Coast Survey. 



Cod lines The usual codfishing handlines. These lines carried a 3J-pound 



sinker and two hooks and were used only on codfish banks. 



D dredging, or collecting, station. 



e. 1 electric light. 



oxt. cor extensive correction. 



H hydrographic station. 



H. O U. S. Hydrographic Office. 



hbr harbor. 



int. 3 intermediate 3. This is a large ship's net on a 5i-foot ring; net about 



11 feet long made of no. 0000 grit gauze, with about 3 feet of the 

 bottom of no. 3 silk, and a brass bucket at the bottom. The out- 

 side netting is one-half inch webbing for the protection of the silk. 



K. 1 a small plankton or Kofoid net, made of no. 12 silk, on a 14-inch ring. 



K. 2 same as above, but made of no. 20 silk. 



K. 4 same as above, but made of no. 3 silk. 



1. 1 left tangent. 



Lt light. 



Luc. sdr Lucas sounding machine. 



mag magnetic. 



m. b mud bag. 



r. t right tangent. 



spec specimen. 



swabs tangle swabs. 



12^ Tnr 12-foot Tanner beam trawl; next to the 9-foot Agassiz, this was used 



more than any other during the cruise. 



Tnr.-Blish sdr. . .Tanner-Blish sounding machine. 



