DREDGING AND HYDROGRAPHIC RECORDS OF THE U. S, FISHERIES 

 STEAMER ALBATROSS FOR 1904 AND 1905. 



INTRODUCTION AND EXPLANATION OF TABLES. 



The operations of the Albatross in 1904 and 1905 included dredg- 

 ing and other collecting, also hydrographic and meteorologic obser- 

 vations, in three regions, (1) the southern portion of the California 

 coast, (2) the eastern Pacific Ocean, and (3) the Pacific coast of 

 North America between Seattle and Wrangell Island. The stations 

 occupied during these explorations, with complete data for each, 

 are recorded in the following tables. For the convenience of natur- 

 alists who may be interested in a particular region the three cruises 

 are treated separately, and to facilitate tabulation the serial tem- 

 perature records where taken are embodied in separate tables. The 

 form of presentation, abbreviations, etc., are essentially the same 

 throughout. 



The various kinds of apparatus used at each station are recorded 

 in chronological order, each on a separate line, under the station 

 number. All stations where apparatus was employed to collect 

 natural history material are given numbers in the "dredging" or 

 collecting station series, and are indicated by the prefixed letter D. 

 The hydrographic stations have another series of numbers and are 

 designated by the letter H. At times specimens were taken with 

 dip nets or small open tow nets during the occupation of a hydro- 

 graphic station, but, on account of the irregularity of such collecting, 

 the station was not regarded as a dredging station. 



The " position" of a station is that point occupied by the vessel 

 as determined by the navigator by means of sights, bearings, or 

 dead reckoning at the time of beginning the first operation at that 

 station. The position of the subsequent operations under the same 

 station number correspond in a general way to the line as indicated 

 under "Drift." The distance covered by all the operations of a 

 station, however, is usually not greater than the negligible error of 

 observation, except in stations near shore determined by bearings. 

 In the case of those stations in which only the pump filter was 

 operated, contrary to all other cases, the station number is applied 

 to the position at the end of the haul. 



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