INTRODUCTION 



At some stations in this list the depths of observations were measured by unprotected 

 thermometers, and these are shown in the column headed "Depth by thermometer". 

 The next column, "Depth (metres)", gives intermediate depths obtained graphically 

 from the thermometric measurements, or, when unprotected thermometers were not 

 used, from the length of wire paid out, on the assumption that the wire hung vertically. 



Time is again expressed on the 24-hour system, the day ending with midnight (0000). 

 The difference of the ship's time from Greenwich mean time (GMT) is noted in the 

 "Remarks" column, this difference holding good until another entry is made. To 

 convert ship's time to GMT the figure in the "Remarks" column is to be added or 

 subtracted according to sign. Times in heavy type refer to biological observations made 

 between sunset and sunrise. 



The following symbols are used for nets, apparatus, etc. : 



B Oblique. 



CPR Continuous plankton recorder. 



DC Conical dredge. Mouth 16 in. in diameter (40-5 cm.) with canvas bag. 



DGP Pressure depth gauge: a modification of the Budenberg pattern. 



DRL Large rectangular dredge. 



H Horizontal. 



KT Kelvin tube. 



^ "^ „ [ Nets with mesh of 4 or 7 mm. (o-i6 in. or 0-28 in.) attached to back of trawl. 



N 50 50 cm. tow-net. Mouth circular, 50 cm. in diameter (19-5 in.): 200 meshes to the linear 



inch. 

 N 70 70 cm. tow-net. Mouth circular, 70 cm. in diameter (27-5 in.): mesh graded, at cod-end 



74 to the linear inch. 

 N 100 I m. tow-net. Mouth circular, i m. in diameter (3-3 ft.): mesh graded, at cod-end of 



stramin with 10-12 meshes to the linear inch. 

 NH Hand net. 



NS Seine net. Length 30 fathoms (55 m.): mesh at cod-end ij in. (3-8 cm.). 



OTL Large otter trawl. Head rope 40 ft. long (12-2 m.): mesh at cod-end ij in. (3-2 cm.). 



Sh. Coll. Shore collecting. 

 TYF Young-fish trawl. A bag of stramin, with 10-12 meshes to the linear inch, attached to a 



circular frame 2 m. in diameter (6-6 ft.). 

 TYFS Similar to TYF but with the stramin of the net lined for 8 ft. above the bucket with 



No. 60 silk netting for catching small organisms. 

 V Vertical. 



To the symbols for tow nets (N 450, N 100, N 70, N 50, TYF and TYFS) B, H or V 

 is always added to indicate the direction in which the haul was taken. For determining 

 the depths of horizontal and oblique nets, Kelvin tubes or depth gauges were constantly 

 employed. Their use is indicated by symbols in the " Remarks" column, and where no 

 such symbol appears it is to be understood that the depth was estimated. 



The following symbols are used to denote meteorological observations: 



b blue sky whether with clear or hazy atmosphere, or sky not more than one-quarter clouded, 

 be sky between one-quarter and three-quarters clouded, 

 c mainly cloudy (not less than three-quarters covered). 



