^ 



Column 3. Soluble silicate concentration as microgram atoms of silicon 

 per kilogram of the sea water, 



4, Nitrito nitrogen concentration as microgram, atoms of nitro- 

 gen per kilogram of sea water. 



5, Dissolved oxygen concentration as milligram atoms of oxygen 

 per kilogram of sea water, 



6, Dissolved oxygen as per cent saturation, 



7, Hydrogen ; ion concentration, as pH, 



Table II contains the physical and chemical data of the surface 

 waters as obtained on the cruise from the Strait of Juan de Fuca to Butch 

 Harbor, The column headings in: this table have the same meaning as out- 

 lined for Table I, 



Table III is a tabulation of the differences in dynamic depth, 

 differences in dynamic hoightj and computed currents for the stations of 

 sections given in Table I, The stations are grouped in pairs, as indicated 

 in the headings, K is a constant foi" each pair of stations. The value of 

 K is determined from the moan latitude of the stations, the distance be- 

 tween stations and the angular volocity of the earth's rotation. The 

 coliffiins have the following significance : 



Column 1, Depth in meters or pressure in decibars, 



2, A. E X 10 =i difference in dynamic depth x 10"^ for the given 



pair of adjacent stations at the levels indicated in 

 Column I. The differences are obtained from Table I 

 by subtracting the values of dynamic depth at one 

 station from those at another in the order indicated 

 in the heading of the table, 



3, A H X 10"^ Z differeace in dynamic height x 10^ referred to 



the lowest common depth sampled, 



4, This column contains the components of the water velocity 

 in a direction perpendicular to the section. The volocity 

 is expressed iii units of laiots (nautical milos per hour) 

 and is relative to the lowest common depth satriplcd, Po.'-i- 

 tivo and negative values indicate the diroction O'f the 

 current across the section. 



Table IV summarizes the direct current moasurcncnts as obtained 

 at various stations in Bering Sea by the use of the Ekman current meter. 

 JUi explanatory note is given at the beginning of the table , 



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