78 



Land Magnetic Observations, 1914-20 



NORTH AMERICA. 



United States Concluded. 



Station 



Latitude 



Long. 

 East 

 of Gr. 



Date 



Declination 



Local Mean Time Value 



Inclination 



L. M. T. 



Value 



Hor. Intensity 



L. M. T. Value 



Instruments 



Mag'x Dip Circle 



Obs'r 



Goat Island, A Concluded 



Goat Island, B. 



37 48.7 N 



Langley Field, A . 



Langley Field, B . 

 Langley Field, C* 

 Langley Field, D' 



Hampton 



San Diego, HI... 



Brewton 



Austin, Eaperanza 

 Schoolhouse 



37 48.7 N 



37 04.8 N 



37 04.5 N 

 37 04 . 5 N 

 37 04.5 N 

 37 00.7 N 

 32 44 . 7 N 



31 06.9 N 



30 20.4 N 



237 38 



237 38 



283 39 



283 39 

 283 39 

 283 39 

 283 40 

 242 48 



272 55 



262 16 



Oct 17, '16 



Oct 18. 16 



Oct 19, 



Oct 19, 



Oct 20, 



Oct 20, 



Oct 23, 



Oct 25, 



Oct 26, 



Sep 27. 



Sep 27, 



Sep 28, 



Sep 29 , 



Sep 29, 

 3. 



4, 



Oct 

 Oct 



Oct 4, 

 Oct 13. 

 Oct 25. 



Sep 13, 

 Sep 14 . 

 Sep 17, 

 Sep 17, 

 Sep 17, 

 Sep 18, 

 Jul 29, 

 29, 

 4, 

 5, 

 6. 

 7. 



Jul 

 Jun 

 Jun 

 Jun 

 Jun 

 Jun 

 Jun 

 Jun 



Jun 7, 18 

 Jun 8. 18 

 Jun 10, 18 



h h h 



8.8 to 15.2 (4) 



9.4 to 15.3 (4) 



8.3, 9.9,11.5 

 14. 3 to 16. 9 (dv) 



18 16.9 E 



18 17.4 E 



18 18.3 E 

 18 14.5 E 



h h 



9.8 to 

 14.9 (5) 



9.9 to 

 14.9 (6) 



8.7, 9.5 

 10.3,11.1 



9.3,10.1 

 11.1,12.7 



6. 9 to 9.5 (dv) 



18 16.9 E 



8.0to 9.8 (dv) 



18 20.6 E 



9.7,12.2,13.3 

 15.5,15.9,16.2 



9.9,15.7 



9.0,11.0,11.3 



14.0,14.4,16.6 



12.8tol5.5(10) 



18 16.4 E 

 18 15.0 E 

 18 17.0 E 

 18 18.7 E 



18 15.2 E 

 18 13.9 E 



15.6 

 12.0 

 11.0 

 15.9 

 16.2 

 11.0, 

 10.3, 

 13.1, 



13.4 

 12.0 

 15.7 



21.0 W 



24.6 W 



28 W 



59 W 



31 W 



27.4 W 



15 13.9 E 



15 13.4 E 



14.0,17.6 



8.1,11.2 



13.1tol9.6 (dv) 



12.4 



13.2tol9.4 (dv) 

 12.6tol9.4 (dv) 



8.6.14.9 



11. 2 to 19.1 (dv) 



19.6 E 



21.6 E 

 18.9 E 

 15.9 E 



18.7 E 

 16.7 E 



9 10.2 E 

 9 07.2 E 



8.9 to 

 14.0 (13) 



62 05.3 N 



9.6 to 

 15.1 (13) 

 16.2,16.5 



9.0 to 

 15.1 (14; 



62 05.7 N 

 62 04.8 N 



62 05.4 N 



10.3,11.6 

 13.9,15.0 

 11.1.14.5 

 9.5 to 

 16.2 (6) 



8.9 to 

 14.0 (13) 



62 04.6 N 



69 20.2 N 



12.8.14.2 



14.5 



69 17.5 N 



13.9 

 14.7 



58 07.1 N 

 62 51.8 N 



11.6,12.7 

 10.9,11.6 



15.6,16.9 

 8.9,10.6 



.24990 



.24993 

 .25000 

 . 25002 

 .24996 

 .25010 



13.6.14.3 



.0 ... 



60 05.0 N 



. 24980 

 . 25006 

 . 24984 



.24988 



.20301 



.20345 

 . 27293 



. 25208 



. 2.-.2IIS 



. 26928 



25 

 25 

 25 

 25 

 25 

 5 



25 



25 

 25 

 25 



5 



5 



25 



26 

 26 

 26 

 26 

 26 

 26 

 14 

 14 



4 

 4 

 4 

 4 

 4 

 4 



9710 

 9710 



EI 25 



EI 3 

 EI 25 



EI 25 



EI 3 



EI 26 



EI 26 



14.1256 

 206.56(2X1 



23.2(2) 



C IV 



C IV 

 CIV 

 CIV 

 CIV 

 C IV 

 CIV 



CIV 

 CIV 



CIV 

 CIV 



CIV 

 C IV 

 C IV 

 CIV 



CIV 

 C IV 

 C IV 



C IV 



HWF 



HWF 



HWF 



HWF 



HWF 



HWF 



HFJ 



HFJ 



CWH 



CWH 



CWH 



CWH 



CWH 



CWH 



CWH 



JMK 

 JMK 

 JMK 



SOUTH AMERICA. 



Argentina. 



La Quiaca 



Humahuaca 



Bmbarcacion 



Ledesrna 



Jujuy 



Salta, A 



Salta, B 



Talapampa 



Rosario dc la Frontera 

 Tucuman 



22 06.6 S 



23 12.7 S 



23 13.2 S 



23 49.5 S 



24 11.4 S 



24 47.6 S 

 24 47.6 8 



25 33.0 S 



25 48.0 S 



26 51.1 S 



Aug 17. 



Aug 18. 



Aug 22. 



Aug 23, 



Aug 11. 



Aug 12, 



Aug 14, 



Aug 15, 



Aug 15. 



Aug 7, 



Aug 8, 



Aug 9, 



Aug 5, 



Aug 6. 



Aug 6, 



Aug 26, 



Aug 3. 



h 

 10.0, 



9.1, 

 10.2, 



h 

 12.5 

 11.9 



12.6 



10.0, 

 13.3, 

 9.6, 

 9.1, 



14.0 



15.7 



13.1 



9.3,12.1 



12.2.15.9 



9.5,14.6 



9.8. 

 14.1, 



9.4, 

 13.4, 



12.6 

 16.5 

 12.6 

 15.7 



6 28.0 E 

 6 28.0 E 

 6 42.2 E 



5 48.4 E 



6 30.7 E 

 6 51.6 E 

 6 55.8 E 



7 10.7 E 

 7 11.3 E 



7 28.0 E 

 7 29.4 E 

 7 09.0 E 

 7 43.3 E 



h h 

 14.2.14.6 



14.4.14. 



15.2.15.4 

 10.8,11.0 

 14.6.14.8 



13.2,13.5 



14.8,15.0 



14.1,14 

 11.5.11.7 



12 51. 2S 



14 24 4 S 



14 03.2 S 



15 05.0 S 



16 00.6 S 



16 52.6 S 



17 57.5 S 



18 11.4 S 



19 31.8 S 



h h 



10.5 



9 9,11.1 

 10.7,12.0 

 9.2.10.6 

 10.9,13.4 

 13.8.15.1 

 10.3,11.8 

 10.0,11.5 

 14.0,15.0 

 13.8.15.3 



12.4,13.9 



10.3.11.5 

 14.8,16.0 

 10.0.11.3 

 14.0,15.2 



t. g. t. 

 . 26598 

 . 26629 

 . 26352 

 . 26354 

 . 26206 

 . 26268 

 .26193 

 .26266 

 .26221 

 .26173 



. 26075 



.26188 

 .26132 

 .25998 

 . 25922 



25 

 25 

 25 

 25 

 25 

 25 

 25 

 25 

 25 

 25 



25 



25 

 25 



EI 25 

 EI 25 



LLT 

 LLT 

 LLT 

 LLT 

 LLT 

 LLT 

 LLT 

 LLT 

 LLT 

 LLT 

 LLT 

 LLT 

 LLT 

 LLT 

 LLT 

 LLT 

 LLT 



Local disturbance. 



