NOTES ON TABULATED OCEANOGRAPHIC DATA, HMS-31 



Where more than one cast was made on a station, they are separated 

 by a horizontal line. The cast number is indicated by a Roman numeral in 

 the margin. 



Where the corrected, paired, protected thermometer readings differed 

 by more than 0.05*C. below 300 m. or more than 0. 10 "C. above 300 m., both 

 temperature values are tabulated and the depth and salinity are repeated. 

 Delta-t calculated using each temperature value is carried. 



Weather is recorded in the ww (present weather) code given in the 

 U. S. Weather Bureau Circular M, eighth edition, Manual of Marine Meteo- 

 rological Observations. Cloud coverage is in tenths of sky. 



Wind velocity was measured with an anemometer 30 meters above the 

 sea surface. The direction (given to the nearest 10°) is that from which the 

 wind was blowing, measured through 360* from north. 



Ten oxygen samples for each station were titrated. On an ordinary 

 13-bottle cast, oxygen samples were run for all but the 8th, 10th and 12th 

 bottles. Exceptions are stations HI and H31 where samples from the first 10 

 bottles were used. 



Phosphate samples were tested for the first 10 bottles of station HI. 

 From station H2 through H7, phosphates were run for all bottles excepting 

 the 8th, 10th and 12th. On station 8 the lumetron stopped working after the 

 sample from the 9th bottle was run. From station 9 on, a few samples from 

 each station were frozen and analyzed ashore. 



Explanatory Code for Tabulated Data 

 NG - The value or line is in error and is discarded. 

 NS - This water sample was lost. 

 PT - Nansen bottle pretripped and data are unusable. 



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