coded as indicated in table 3> "Cloud 

 Type"; and table h, "Cloud Amount". 



13. Sea . Sea direction and amount are 

 coded as indicated in table 5, "Sea 

 Amount"; and table 1. 



Ik. Swell . Swell directions and amount 

 are coded as indicated in table 6, 

 "Swell Amount"; and table 1. 



15. Visibility . Visibility is coded as 

 indicated in table 7, "Visibility". 



16. Water Transparency . Given as meters 

 to which a Secchi disc is visible. 



values are given in terms of milli- 

 grams per liter to the nearest 0.1 of 

 a unit. Collier et al. (1953) pre- 

 sented a technique for estimating cer- 

 tain elements of the organic materials 

 in sea water which react to the test 

 for carbohydrates. The carbohydrate 

 values are given as arabinose equivai- 

 lents, and are not necessarily the 

 actual concentrations of carbohydrate 

 substances. 



10. Proteins (Tyrosine ) . These values 

 are given to the nearest 0.1 of a 

 unit as milligrams per liter of pro- 

 tein material in sea water, which 

 reacts to the test for tyrosine. 



Subsurface Observations 



1. Sample Depth . Observed (actual) depth 

 of each sample is given in meters. 

 Interpolated values at standard depths 

 are also given. The standard depths 



in meters are: 0, 10, 20, 30, 50, 75, 



100, 150, 200, 250, 300, too, 500, 600, 



700, 800, 1000, 1200, 1500, 2000, 2500, 

 3000, and thence every 1000 meters. 



2. Temperature . The centigrade tempera- 

 ture is given in degrees and hundredths. 



3. Salinity . Salinity is given in parts 

 per thousand to two decimal places. 



k. Sigma-t . To convert to density divide 

 by 1000 and add 1. Thus, a sigma-t 

 value of 22.35 converts to a density 

 of 1.02235- 



5. Pi" solved Oxygen . These values are 

 given in milliliters per liter to two 

 decimal places. 



6. Total Phosphorus . Values are given in 

 microgram atoms per liter to the near- 

 est 0.1 of a unit. 



7« Inorganic Phosphate . Values are given 

 in microgram atoms per liter to the 

 nearest 0.1 of a unit. 



8. Nitrate -nitrite . These values are 

 given in microgram atoms per liter to 

 the nearest 0.5 of a unit. 



9- Carbohydrates (Arabinose) . These 



Biological 



1. Plankton volumes (Gulf III and silk 

 half -meter nets ), table 3. The - posi- 

 tion given is that at beginning of the 

 tow. The depth of the haul is given 

 from to the greatest depth reached. 

 The volumes as given are "wet volumes" 

 (procedures for determination were 

 given under methods in report for 

 Cruise 1). Very few samples contained 

 large organisms such as Jellyfish 

 (which were removed), so that the 

 volumes represent smaller organisms. 



2. Plankton volumes (Gulf IA High-speed 

 sampler ), table 9» The position given 

 is that at the center of the tow. All 

 tow6 were made at the surface. The 

 volume as given are "wet volumes" (pro- 

 cedures for determination were given 

 under methods in report for Cruise 1^ . 

 Very few samples contained large organ- 

 isms such as jellyfish (which were 

 removed), so that the volumes represent 

 smaller organisms. 



3- Numbers of plankton organisms per 



cubic meter of water (half -meter net) , 

 table 10. The procedures for plankton 

 tows, methods for sorting and counting, 

 and calculations of numbers of organ- 

 isms were described under methods in 

 report for Cruise 1. Counts are given 

 for major groups as indicated. 



k. Numbers of plankton organisms per 

 cubic meter of water (high-speed 



