TNL Large fish-trap. Rectangular, 4 ft. by 4 ft. by 2J ft. (1-2 m. .< 1-2 m. x 075 m.), with 

 netting or wire of i- in. mesh (12-5 mm.). 



TYF Young-fish trawl. Mouth about 20 ft. in circumference (6 m.): bag of stramin with 



II to 12 meshes to linear inch. Fished until July 1926, with poles and otter-boards, 

 thereafter attached to a circular tow-net frame 2 m. in diameter (6-6 ft.). 



V Vertical. 



Unless specially noted to the contrary (by the addition of V) nets N200 and N450 were 

 towed horizontally. To the symbols for smaller tow-nets (N 100, N 70, N 50, NC 50) 

 B, H or V is always added to indicate the direction in which the haul was taken. 



Vertical nets were hauled at i m. per second and, unless the haul ended at the surface, 

 were closed by the Nansen method. 



Oblique nets were hauled as soon as shot at a speed of 10 m. per minute, with the 

 ship moving at about 2 knots. 



Horizontal nets were shot open, but except for surface work were very frequently 

 closed on the Nansen principle before being hauled. When no addition is made to the 

 figures in the depth column, it is always to be understood that the tow-net or young-fish 

 trawl was closed before hauling ; but when such an expression as (— o) or (— 50) follows 

 the figure for depth, it is implied that the net, though fishing for the time indicated at 

 the major depth, was hauled open to the surface or to a higher level. Plankton nets 

 catch practically nothing while being shot: if closed before hauling there is good 

 reason to believe that all the organisms were caught at the indicated depth. When, 

 however, the net is hauled open to a higher level there is less certainty of this; for 

 though it may have been towed for a considerable time at the greater depth, some 

 organisms will have been caught during its upward passage. 



When, at a single station, a nuinber of similar hauls was made with the same type of 

 net, the hauls are distinguished by letters which are entered in the " Remarks" column. 



For determining the levels at which horizontal nets were towed and from which 

 oblique nets were hauled, Kelvin tubes or depth gauges were constantly employed. 

 A symbol indicating the type of gauge will be found in the "Remarks" column, and 

 if no such symbol occurs it is to be understood that the depth was estimated. 



Times are expressed on the 24-hour system, the day ending with midnight (0000). 

 The entry under "shot" states the time when all the warp was paid out. That under 

 " hauled " either gives the time when hauling began, or, with closing nets, the time when 

 the messenger was estimated to have arrived. When series of vertical nets were taken, 

 only the times for the beginning and end of the series are given. The times given are 

 "ship's time," corresponding nearly with local mean time. In order to distinguish 

 hauls which were made when it was dark, those times which fall between sunset and 

 sunrise are printed in heavy type. 



Length of tow was measured by the ship's log, by time and estimated speed, or by 

 differences in observed positions. 



At the end of the lists (p. 138) will be found a summary of the stations made by the 

 ' Discovery ' and ' William Scoresby ' with references to the charts on which the positions 

 are marked. A chart of South Georgia is added, on which the names of all places 

 mentioned in the list of MS stations will be found. 



