254 



CARNEGIE INSTITUTION OF WASHINGTON. 



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

 Washington, D. C, December 1917 to June /5iS^-Continued. 



Date. 



Carnegie values. 



Hor. 

 Int. 



Chart differences. 



Decl'n and Incl'n. 



Brit. 



Ger. 



U.S. 



Hor. Int. 



Brit. 



Ger. 



U.S. 



1918 

 Apr. 18 

 19 

 19 

 19 

 20 

 20 

 20 

 21 

 21 

 21 

 22 

 22 

 23 

 23 

 24 

 May 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 



.323 



.324 



.324 



.322 

 .322 

 .320 



.318 



.314 



.314 



.310 



.306 



.300 



.300 



.290 



0.2E 



0.2E 



3.9N 



0.3E 



O.IE 



3.8N 



0.0 



0.2E 



4.3N 



O.IE 



0.0 



4.4N 



0.4W 



4.3N 



O.IE 



3.6N1 



0.2E 



0.3E 



3.2N 



0.3E 



0.4E 



2.7N 



0.3E 



0.3E 



2.3N 



0.3E 



0.8E 



1.9N 



0.4E 



0.5E 



1.9N 



0.3E 



0.8E 



2. ON 



0.7E 



0.7E 



1.9N 



0.3E 



0.7E 



1.6N 



0.2E 



O.IW 

 O.IW 

 5.2N 

 O.IW 

 0.5W 

 5.2N 

 0.4W 

 0.3W 

 4.9N 

 0.3W 

 0.5W 

 4.6N 

 0.8W 

 4.5N 

 O.IW 

 3.1N1 

 0.2E 

 0.3E 

 2.9N 

 0.3E 

 0.4E 

 2.7N 

 0.3E 

 0.3E 

 2.7N 

 0.4E 

 0.8E 

 2.9N 

 0.4E 

 0.5E 

 2.9N 

 0.4E 

 0.8E 

 3. ON 

 0.8E 

 l.OE 

 3.2N 

 0.6E 

 l.OE 

 2.8N 

 0.4E 



O.IE 

 0.2E 



O.IE 

 0.0 



O.IE 

 0.2E 



0.3E 

 O.IE 



0.2W 



0.3 E 



0.3E 

 0.3E 



0.3E 

 0.4E 



0.4E 

 0.4E 



0.3E 

 0.8E 



0.6E 

 0.7E 



0.6E 

 l.OE 



6.8E 

 0.8E 



0.4E 

 0.6E 



0.0 



11 

 -11 

 -12 



13 

 -15 

 -13 

 -17 



91 



- 9 



-'7 

 -7 



-111 



-12 

 -15 

 -15 

 -17 

 18 

 21 

 -18 

 -18 



-17 



-14 



-14 



-15 



-16 



261 



20 



22 



23 



24 



25 



25 



22 



-22 



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

 1900; British Admiralty Charts No. 3777 for 1917, 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 cha^-t 

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

 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. 



*Unit3 of third decimal c. g. a. 



