INTRODUCTION 



f fog. 



fe wet fog. 



g gloomy. 



h hail. 



kq line squall. 



1 lightning. 



m mist. 



o overcast sky (i.e. the whole sky covered with unbroken cloud). 



p passing showers. 



q squalls. 



r rain. 



rs sleet (i.e. rain and snow together). 



s snow. 



t thunder. 



tl thunderstorm. 



u ugly, threatening sky. 



V unusual visibility. 



w dew. 



z dust haze ; the turbid atmosphere of dry weather. 



Soundings taken by the echo-sounding apparatus are marked with an asterisk. 



At the end of the hsts (p. 422) will be found a Summary of the Stations made by the 

 R.R.S. 'Discovery IF from October 1937 to May 1939, with references to the Charts 

 (Plates IV-VI) on which the station positions are marked. 



REFERENCES 



Atkins, W. R. G., 1923. The silica content of some natural waters and culture media. Journ. Mar. Biol. 



Ass. U.K., xiii, pp. 151-9. 

 BucH, K., 1929. On the determination of pH in sea water at different temperatures. Journ. du Cons, iv, 



No. 3, pp. 267-80. 

 Cooper, L. H. N., 1933. Chemical constituents of biological importance in the English Channel, November 



1930 to January 1932. Part I. Phosphate, silicate, nitrate, nitrite, ammonia. Journ. Mar. Biol. Ass. 



U.K., xviii, pp. 677-728. Part II. Hydrogen-ion concentration, excess base, carbon dioxide and oxygen. 



Journ. Mar. Biol. Ass. U.K., xvni, pp. 729-54. Part III, June-December 1932. Phosphate, silicate, 



nitrite, hydrogen-ion concentration, with a comparison of wind records. Journ. Mar. Biol. Ass. U.K., xix, 



PP- 55-62. 



1938. Salt error in determination of phosphate in sea water. Journ. Mar. Biol. Ass. U.K., xxin, pp. 171-8. 



Geissler, H., 193 1. Tiefenmessung mit ungeschiitzen Thermometern. Ann. d. Hydr. usw., 59, pp. 433-8 



(i Tafel). 

 Harvey, H. W., 1934. Measurement of phytoplankt on population. Journ. Mar. Biol. Ass. U.K., xix, pp. 761- 



73- 

 Marr, J. W. S., 1938. On the operation of large plankton nets. Discovery Reports, Vol. xvni, pp. 105-20. 



McClendon, J. F., 1917. The standardization of a new colorimetric method for the determination of the 

 hydrogen-ion concentration, CO., tension, and CO.^ and O^ content of sea water, etc. Journ. Biol. Chem., 

 XXX, pp. 265-88. 



Schumacher, A., 1935. Kippthermometertafehi, neuberechnet auf Grund der Formeln von W. Hansen. Ann. 

 d. Hydr., usw., 63, pp. 237-9 (4 Tafeln). 



200 



