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Biological Data 

 Phytoplankton: depth (m) of chlorophyll a (mg/m^, 1, 0.30; 5, 0.28; 15, 0.31; 25, 0.50; 50, 0.68; 100, 0.11. 

 Water column chlorophyll a: 43 mg/m^. 

 Phytoplankton haul taken. 

 Zooplankton: N-C N, o to 261 m, 1706-1739 GCT, 90 ml T, 90 ml S; H at m, 1710-1740 GCT, 74 ml T, 74 ml S. 



STATION 71 

 (regular night) 



May 25, 1958; 0500-0746 GCT; 8°28'N, 84°20. 5'W; 1200 £m; wind, 330°, force 3; temp. , 82. 8°F dry, 78.5°Fwet; 

 weather, missing; clouds, missing; sea, 1; swell, 320°, missing; time zone 5. 



Biological Data 



Zooplankton: N-C N, o to 304 m, 0532-0605 GCT, 150 ml T, 150 ml S; H at m, 0041-0611 GCT, 215 ml T, 

 215 ml S. 



Nekton: o to 105 m, 0017-0623 GCT, 249 ml T. 



Night-lighting operations. 



STATION 72 

 (regular forenoon) 



May 25, 1958; 1651 GCT; 9°30'N, 85°52'W; 1800 £m; wind, 210° 

 rain; sea, moderate; wire angle, 03"; time zone 6. 



force 2; temp. , 77. 8°F dry, 75. 3°F wet; weather. 



a) Duplicate values: 30 m, 0.38; 148 m, 2.34; 469 m, 2.96; 1026 m, 3.33 ng at/L. 



b) Alternate depth of 970 meters possible, but not probable. 



