28 



Where the isosteres lie deepest and the inclmation is greatest, 

 there is indicated at that place a tendency to push the water upwards 

 with a maximum strength, and where the isosteres lie highest, there 

 the force is at a maximum tending to drive the water downwards. 

 But whatever the position of the isosteres may be, it is well to bear 

 in mind that when the section lies at right angles to the direction of 

 the current, there is no actual movement of the water particles within 

 the vertical plane whatsoever. The value of the solenoids lies in 

 the fact that they express the presence of a force or forces tending to 

 cause circulation around the rectangle. The Ferrelian force (effect 

 of earth rotation) precludes actual movements restricted solely parallel 

 to the current path AB, Figure 7, page 23, as previously described. 



DETERMINATION OF DYNAMIC DEPTH, STATIONS 205 AND 206 



We may continue to treat the Ice Patrol records of stations 201 to 

 206 dynamically, by computing the values of specific volume from the 

 given station data and correcting the same to specific volume in situ ; 

 then, by means of the equation on page 25, determine the dynamic 

 depth of the successive isobaric surfaces of observation. In order 

 simply to illustrate the methods customarily employed, we have 

 selected two stations only, stations 205 and 206 located on the 

 northern edge of the Gulf Stream south of Newfoundland. Similar 

 procedure and similar results follow, of course, in like manner from 

 other given station data. 



dp 



Meter 

 depth 



dt 



Table 

 III 



Table 

 IV 



I Mean 



I 2l 



21m-5p 



22 



(E- 

 EOlOii 



V105 



(V- 

 Vi)10« 



STATION 205 



50 



75 



125 



200 



300 





 50 

 125 

 250 

 450 

 750 



5.7 33.93) 26.77 



12.0 35.3l! 26.85 



10. 1 35. 161 27. 07 

 6.7 35.00; 27.48 

 5.4 35.04 27 

 4.6 35.01! 27.75 



2607 

 2615 

 2635 

 2674 

 2694 

 2700 







22 



53 



109 



197 



327 



2607 

 2637 

 2688 

 2783 

 2891 

 3027 



2622. 5 

 2662. 5 

 2735. 5 

 2837. 

 2959. 



1311251 



199687 

 341938' 

 567400 

 887700! 



131125 

 330812 







48. 68875 

 121.69188 

 672750 243.27250 

 1240150 437. 59850! 

 2127850 728. 72150 





 . 06225! 

 . 14676 

 . 25251 

 . 36501 

 . 50201 



. 97393 

 . 97363 

 . 97312 

 . 97217 

 .97119 

 .96973 



129' 

 121 

 104 

 65 



47 

 44 



STATION 206 



50 



75 



125 



200 



300 





 50 

 125 

 250 

 450 

 750 



18.1 

 18.0 

 16.3 

 12.9 

 9.2 

 6.6 



36.21 

 36.33 

 36.11 

 35.56 

 35.12 

 34.95 



26.18 

 26.31 

 26.55 

 26.86 

 27.20 

 27.46 



2551 

 2564 

 2587 

 2616 

 2648 

 2672 







22 



50 



106 



193 



323 



2551 

 2586|' 

 3637| 

 2722i 



2841 1 

 2995: 



2568.51 128425 --;5oi5; 

 2611.51 195862 ^;°*a^ 

 2679. 5\ 334937 iitioA 

 2781.5! 556500 ^'^^■'"^ 

 2918.0, 875400i 



i\ 1215724 



185 

 172 

 155 

 126 

 97 

 76 



Col. 1 



C0I.2; C0I.3 



I 



C0I.4 



C0I.5 



Col .6 



Col.7! C0I.8 C0I.9 



Col.lO 



Col. 11 



Col. 12 Col. 13 



Col. 14 Col. 15 



The abbreviations appearing at the top of the columns in the pre- 

 ceding compilation of computations are explained as follows : 



Column 1 (dp) represents the difference of pressure in decibars of 

 successive observed depths, which for all practical purposes is equal 

 to the differences in depths of observation in meters. 



Column 2 contains the depths at which observations were made. 



