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DISCOVERY INVESTIGATIONS 

 STATION LIST 



i933- I 935 



(Plates I-IV) 



INTRODUCTION 



his list is a continuation of the Station Lists already published in Discovery Reports, 

 vols, i, in, iv and xxi and it gives particulars of observations made by the R.R.S. 

 'Discovery II' from November 1933 to May 1935. It is drawn up on the same lines 

 as the Station List in vol. xxi published in February 1941. There is, however, one 

 important difference : no pH values are given, because, although colorimetric determina- 

 tions were made at most stations, it was not possible, owing to difficulties of replacement, 

 to make any reliable correction for the fading of the standard buffer-tubes ; consequently 

 the figures are likely to be of only limited value and have not been printed. 



Between stations 1435 and 1459 inclusive, a defective Ekman reversing water sample 

 bottle was apparently in use at some stations for some depths. During hauling to the 

 surface, admixture of other sea water occurred to the sea water sample in the Ekman 

 reversing water bottle. This was clearly evidenced by the salinity titrations which 

 usually showed that a dilution had occurred. The depths at which this particular water 

 sample bottle was in use are shown in italics and the chemical data belonging to these 

 depths are suspect and have been marked with a query to show this. Interpolation for 

 salinity has been made and this is shown by the use of brackets enclosing the salinity 

 and at values. 



In order to specify the depths at which sea water samples were obtained at each 

 hoist of reversing water sample bottles, a small index figure has been placed above the 

 figures in the column headed " Depth (metres) ". The samples from depths bearing the 

 same index figure were obtained from the same hoist of water sample bottles. With 

 this knowledge and the readings given by the unprotected thermometers, it has been 

 possible to interpolate and give probable values of depth to each reversing water bottle. 



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. 



Abbreviations for nets, etc., used during 1933-5 are as follows: 



B Oblique. 



BNR Russell's bottom tow-net. A 100 cm. net on a frame attached to skids which raise it clear 



of the bottom. 

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



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