DISCOVERY INVESTIGATIONS 

 STATION LIST 



1929-193 1 



(Plates I-V) 



INTRODUCTION 



THE following lists contain particulars of all stations made by the R.R.S. ' Discovery 

 11 ' from January 1930 to May 193 1, by the R.R.S. 'William Scoresby' from May 

 1929 to April 193 1 and by the staff of the Marine Biological Station, South Georgia, 

 from November 1930 to March 193 1 . Stations taken by the ' Discovery II ' are entered 

 first : they are numbered in continuation of those taken by the 'Discovery' in 1925-7 

 and have no letters prefixed to the numbers. Those of the 'William Scoresby' and the 

 Marine Biological Station follow and are distinguished respectively by the prefixed 

 letters WS and MS. 



In most respects the lists are drawn up on the same lines as those previously published 

 (vol. I, pp. 3-5, and vol. 11, pp. i, 2), but there are a few innovations in that for stations 

 made by the ' Discovery 11'. In this list the force of the wind is given in knots, as in- 

 dicated by a Munro anemometer, instead of by Beaufort's scale, and both dry and wet 

 bulb readings for air temperature are inserted. Soundings taken by the echo-sounding 

 apparatus are distinguished by an asterisk. 



Estimation of hydrogen-ion concentration was made by the colorimetric method, 

 cresol red being used as indicator with McClendon's standards, and phosphate content 

 was determined by Atkins' method. Nitrate was estimated by Harvey's method and 

 nitrite with the Griess-Ilosvay reagent. Submarine illumination was measured photo- 

 chemically by the decomposition of uranyl oxalate solutions. 



The following symbols are used for nets and apparatus : 



B Oblique. 



BNR Russell's bottom tow-net. An N 100 net (see below) attached to a frame 4 ft. 10 in. 



(1-47 m.) long and 15 in. (38 cm.) wide, with skids on either side which keep the mouth 



6 in. (15 cm.) above the bottom. 



CWS Water sample centrifuged for phytoplankton. 



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



DGB Depth gauge, Budenberg pattern. 



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



DLH Large dredge. Heavy pattern, 4 ft. in length (1-2 m.). 



H Horizontal. 



HH Hand harpoon. 



KT Kelvin tube. 



LH Hand lines. 



V^ "^"i,! Nets with mesh of 4 or 7 mm. (o-i6 in. or 0-28 in.) attached to back of trawl. 

 N 7-TJ • t / \ 



