PRESENTATION OF THE DATA 



In the Pacific Ocean, radioisotope rates of carbon fixation used 

 for primary productivity have been entered by area, that is by Marsden 

 statistical rectangles. Phytoplankton pigment analyses made in conjunction 

 with primary productivity studies have been presented by cruise. In the 

 Atlantic Ocean all the data have been reported by area and by cruise. In all 

 instances_, the information is given in chronological order and by depth. 



Following are explanations of the column headings: 



Vessel . Code symbol as indicated in the "List of Contributors." 



Cruise . Number originally given by the contributor or an artificial 

 number. 



Station . Number or symbol originally given by the contributor or 

 an artificial number. 



Time. Local Zone Time rounded off to the nearest hour, day^ month 

 and year in that order. 



Position . Latitude and longitude in degrees and minutes. 



Marsden . Marsden statistical rectangle for the ten degrees square 

 within which the station was located. 



Depth . Sampling depth rounded off to the next meter. 



Values . Index to the techniques or units used for the Pacific Ocean 

 data;, often referred to as technique column 39. 



