DISCOVERY INVESTIGATIONS 

 STATION LIST 



1925-1927 



(Plates I— VI) 



INTRODUCTION 



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

 the R.S.S.' William Scoresby' and by the staff of the Marine Biological Station at 

 South Georgia up to the end of September 1927. 



Stations made by the ' Discovery ' are entered first and have no letters prefixed to the 

 numbers. Those of the 'William Scoresby' follow (pp. 92-131) and are distinguished 

 as WS I, WS 2, etc. Finally (pp. 132-137) those of the Marine Biological Station are 

 given, numbered MS i, MS 2, etc. 



Positions are given either in latitude and longitude or as true bearings of some fixed 

 point on land. 



The abbreviations used in denoting the nature of the bottom are : 



— placed above the figure for the sounding indicates that bottom was not reached. 



The directions of wind, sea and swell are true bearings and with the two first the 

 force is expressed in terms of Beaufort's scale. Weather is indicated by Beaufort's 

 symbols. Barometer readings are corrected for latitude and temperature. The air 

 temperature was read in degrees Fahrenheit and is here converted to Centigrade. The 

 age of the moon is expressed in days : the phases new moon, first quarter, full moon 

 and last quarter are thus represented respectively by the numbers i, 8, 15 and 22. 



In the chemical observations all temperatures are fully corrected. Salinity (S °/^J 

 was determined by the chemical estimation of the chlorine content. Density (crt) is 

 calculated from the corrected readings for temperature and salinity. Estimation of 

 the hydrogen-ion concentration (pH) was made by the colorimetric method, phenol 

 red and thymol blue being used as indicators. Phosphate content was determined 

 by Atkins' method. 



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



B Oblique. 



BTS Small beam trawl. Beam 8 ft. in length (2-45 m.): mesh at cod-end i in. (12-5 mm.)*. 



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



* All measurements are taken from knot to knot along one side of the mesh, not diagonally with the 

 mesh stretched. 



