DEPARTMENT OF TERRESTRIAL MAGNETISM. 



249 



Table 2. — Preliminary results of ocean magnetic observations on the Carnegie from Buenos Aires 

 to Washington, D. C, December 1917 to June 1918} 

 Observers: H. M. W. Edmonds, commanding the Carnegie; A. D. Power, B. Jones, L. L. Tanguy, 

 J. M. McFadden, and W. E. Scott. 



Date. 



Lat. 



Long, 

 east 

 of Green- 

 wich. 



Carnegie values. 



Decl'n. 



Incl'n. 



Hor. 

 Int. 



Chart differences.* 



Decl'n and Incl'n. 



Brit. 



Ger. 



U. S. 



Hor. Int. 



Brit. 



Ger. 



U.S. 



1917 

 Dec. 6 

 6 



7 

 7 

 7 



9 

 9 

 9 



10 

 10 

 10 

 11 

 11 

 11 

 12 

 12 

 12 

 13 

 13 

 13 

 14 

 14 

 14 

 15 

 15 

 15 

 16 

 16 

 16 

 17 

 17 

 17 

 18 

 18 

 18 

 19 

 19 

 19 

 20 

 20 

 20 



35 17 S 

 35 17 S 

 35 43 S 



35 53 S 



36 15 S 



37 31 S 



38 02 S 



38 20 



39 07 

 39 15 

 39 04 



38 53 



39 00 

 39 01 



39 48 



40 06 



40 18 



41 18 S 



42 15 S 



42 42 S 



43 27 S 

 43 22 

 43 16 

 43 04 

 43 04 

 43 00 



43 42 



44 54 



45 31 



46 50 



47 42 S 

 47 55 S 



49 00 



50 06 



50 30 



51 04 

 51 38 



51 56 S 



52 45 S 



53 15 

 53 25 

 53 14 

 53 08 

 53 09 



303 19 



303 34 



304 05 

 304 10 

 304 21 



304 59 



305 03 

 305 04 

 304 45 

 304 53 

 304 38 

 303 33 

 302 57 

 302 55 

 302 32 

 302 21 

 302 10 

 301 13 

 300 17 

 299 35 



298 53 



299 04 

 298 58 

 298 44 

 298 54 

 298 54 

 298 12 

 297 15 

 296 47 

 296 49 

 296 55 

 296 51 



296 52 



297 32 

 297 45 

 297 51 



297 56 



298 13 



299 19 



300 17 

 300 52 

 300 33 

 300 12 

 299 38 



3.7E 

 3.5E 

 3.2E 



3.0E 

 2.9E 



3.1 E 

 3.6E 



3.7E 

 4.5E 



5.2E 

 5.6E 



6.2E 

 7.3E 



8.9E 

 9.6E 



9.6E 

 9.6E 



9.6E 

 10. 2E 



11. 8E 

 12. OE 



12. 7E 

 12. 6E 



12. 5E 

 12. 4E 



12. 4E 

 11. 9E 



li.2E 

 11. OE 



12. OE 



29.6 S 



ai.5 s 



32.9 S 



32.7 S 

 34^1 S 

 36^9 S 



37.8 S 

 37.6 S 

 40.0 S 

 42.8 S 

 45.0 S 

 46.8 S 

 47.7S 

 47 .4 S 



c.g.s. 



.244 

 .244 

 .245 

 .248 

 .248 

 .252 

 .256 

 .256 

 .259 

 .261 

 .265 

 .266 

 .263 

 .264 



0.1 E 



0.2E 



0.2E 



0.3N 



0.0 



O.IW 



0.8N 



0.2W 



0.3W 



0.8N 



0.3W 



0.3W 



l.ON 



0.2W 



0.4W 



0.9N 



0.3W 



O.IW 



l.ON 



0.0 



0.0 



1.6N 



0.1 E 



0.0 



1.7N 



0.1 E 



0.0 



I.IN 



0.1 E 



O.IW 



l.ON 



0.3E 



0.2W 



0.9N 



0.2W 



0.3W 



0.4N 



0.3W 



0.4W 



0.5N 



0.3W 



0.6W 



0.7N 



0.2W 



O.IE 



O.IE 



0.3E 



0.6 S 



O.IW 



0.2W 



0.3 S 



O.IW 



0.3W 



0.1 S 



O.IW 



O.IE 



0.3N 



0.3E 



0.0 



0.3N 



0.5E 



0.2E 



0.3N 



0.2E 



0.3E 



l.ON 



0.4E 



0.2E 



I.IN 



0.4E 



0.3E 



l.ON 



0.3E 



0.4E 



0.9N 



0.8E 



0.4E 



l.ON 



0.3E 



0.0 



0.5N 



0.0 



0.2W 



0.8N 



O.IW 



0.5W 



l.ON 



0.0 



0.3E 

 0.4E 

 0.2E 



0.0 

 0.0 



0.0 

 O.IW 



6.4W 

 0.2W 



o!iw 



0.3W 



O.IW 

 0.1 E 



11 



- 7 



10 



-11 



-10 



-11 



10 



11 



-13 



■12 



O.IE 



-12 



-13 



-13 



-12 



-13 



-14 



-12 



-12 



-12 



12 



- 7 



^For previous table, see Annual Report for 1917. 



^Charts used until April 24, 1918: U. S. Hydrographic Office Chart No. 2406 for 1915 and No. 1701 for 

 1900; British Admiralty Charts No. 2598 for 1912, Nos. 3598 and 3603 for 1907; Reichs-Marine-Amt 

 Charts Tit. XIV, No. 2 for 1910, Tit. XIV, Nos. 2a and 2b for 1905. The chart differences are obtained 

 by subtracting corrected chart values, derived as explained in previous sentence, from the observed 

 Carnegie values. The letter E signifies that the chart value for east declination is smaller, or the chart 

 value for west declination larger, than the Carnegie value; W signifies the reverse. The letter N signifies 

 that the derived chart value for northerly inclination is smaller, or for southerly inclination larger, 

 than the Carnegie value; S signifies the reverse. The plus sign signifies that the derived chart value 

 for horizontal intensity is smaller than the Carnegie value, the minus sign meaning, of course, the reverse. 



*Units of third decimal c. g. 8. 



