92 



Land Magnetic Observations, 1914-20 



Station 



Colombo, AV 



Colombo, C" 



Latitude 



o / 

 6 54. 2N 



6 54.2 N 



Long. 

 East 

 of Gr. 



79 52 



ISLANDS, INDIAN OCEAN. 

 Ceylon. 



Date 



Oct 29, 



Oct 30, 



Jul 6, 



Jul 6, 



Jul 6, 



Jul 7, 



Jul 7, 



Jul 7, 



Jul 8, 



Jul 8, 



Jul 12, 



Jul 

 Jul 

 Jul 

 Jul 

 Jul 

 Jul 

 Jul 

 Jul 

 Jul 

 Jul 

 Jul 

 Jul 

 Jul 

 Jul 

 Jul 

 Jul 

 Jul 



Jul 13, 20 



Jul 13. 



Jul 13, 



Jul 14, 



Jul 14. 



Jul 20. 



Declination 



Local Mean Time Value 



h h 

 16.3,17.7 



8.6,12.0,12.4 



14.8,15.4.17.4 

 8.6. 9.8,10.3 



10.8.13.6 



14.8,17.0 



10.1,11.7.12.2 



15.4 to 17.1 (6) 

 8.8tol0.2 (5) 

 8.6,12.0,12.4 



14.8,15.4,17.4 

 8.6, 9.8,10.3 



10.8.13.6 



14.8,17.0 



10.1,11.7,12.2 



15.6tol7.8 (dv) 

 6.6 to 8.7 (dv) 



6.8 to 8.2 (dv) 



16.2 to 18.0 (dv) 



2 20.8 W 



2 29.4 W 



2 28.7 W 

 2 28.1 W 

 2 29.0 W 

 2 28.9 W 

 2 29.2 W 



2 27.7 W 

 2 28.1 W 

 2 31.7 W 



2 29.3 W 

 2 28.4 W 

 2 29.7 W 

 2 29.6 W 

 2 30.6 W 



2 29.4 W 

 2 28.4 W 



2 27.9 W 



2 29.1 W 



Inclination 



L. M. T. Value 



10.1 to 

 16.5(10) 

 8.5 to 

 11.1 (7) 



10.1 to 



16.5 (10) 

 8.6 to 



11.1 (7) 

 14.4 to 



16.6 (4) 

 9.4 to 



16.7 (10) 



4 15.3 S 



4 11. 6S 

 4 09.3 S 



4 20.0 S 

 4 17.3 S 

 4 20.5 S 

 4 19.3 S 



Hor. Intensity 



L. M. T. Value Mag'r Dip Circle 



h h 

 16.7,17.4 



9.3,11.5 

 13.0,14.3 

 15.9,17.0 



11.5,12.9 



15.8 



9.3,10.5 

 11.4 



9.4.11.5 

 13.0.14.3 

 15.9,17.0 



11.4,12.9 

 15.8 



9.3.10.6 

 11.4 .... 

 13.1,13.7 

 14.7.15.8 



8.4, 9.5 

 10.2,11.3 

 12.6,13.3 



15.2.15.8 



10.3 .... 

 15.7,16.3 



Instruments 



.38222 



.38418 

 .38389 

 .38329 



. 38392 

 . 38345 

 .38406 

 .38407 



.38436 

 .38370 

 . 38340 



.38422 

 .38364 

 . 38402 

 .38413 

 . 38355 

 . 38336 

 .38386 

 . 38406 

 .38398 



.38367 



.38419 

 .38348 



17 



25 



25 



25 



25 



5 



5 



5 



5 



25 



25 



5 



5 



5 



5 



25 



25 



25 



25 



25 



25 



25 



25 



25 



25 



25 



25 



25 

 25 



223.1356 



EI 25 



EI 7 



EI 7 

 EI 25 

 EI 25 

 EI 25 



Obs'r 



HES 

 HES 

 C VI 

 C VI 

 C VI 

 C 



C VI 

 C VI 

 C VI 

 C VI 



C VI 



C VI 

 C VI 

 C VI 

 C VI 

 C VI 

 C VI 

 C VI 

 C VI 

 C VI 

 C VI 

 C VI 

 C VI 

 C VI 

 C VI 

 C VI 

 C VI 

 C VI 



C VI 



C VI 



C VI 



C VI 

 C VI 

 C VI 



Madagascar. 



Majunga, A 



Majunga, B 



Maevatanana, A . . . . 

 Maevatanana, B. . . . 

 Antsiafabositra 



Andriba 



Mahatsinjo 



Ankazobo 



Fihaonana 



Tananarive 



Tananarive ObservU' 

 tory, A* 



Tananarive Observ- 

 atory, B" 



15 42.9 S 



15 43.4 3 



16 56.4 S 



16 56.9 S 



17 18.4 S 



17 36.3 S 



17 44.3 S 



18 18.9 S 



18 36.2 S 

 18 54.9 S 



18 55.0 S 



18 55.0 S 



46 19 

 46 19 



46 48 

 46 48 

 46 56 



46 54 



47 00 



47 06 



47 11 

 47 30 



47 32 



47 32 



Oct 

 Oct 

 Oct 

 Oct 

 Oct 

 Oct 

 Oct 

 Oct 

 Oct 

 Oct 

 Nov 

 Nov 

 Nov 

 Nov 



18, '20 



15. 20 



16, 20 



24, 20 



25. 20 



27, 20 



28, 20 



29, 20 



30, 20 



31, 20 



9, 20 

 22. 20 



Nov 13, 20 



Nov 15, 20 



Nov 15. 20 



Nov 16, 20 



Nov 17, 20 



Nov 17, 20 



Nov 18. 20 



Nov 12, 20 



Nov 13. 20 



Nov 13. 20 



Nov 16, 20 



h h h 



9.6.11.0 



10.3.11.6 



5.8tolS.l (dv) 



9.4.10.8 



9.3.10.7 



16.1,17.4 



16.9,17.8 

 16.3,17.6 



8.3, 9.6 

 7.1, 8.5 

 9.5.11.5 



13.0.14.4 

 7.2, 8.8 

 9.0,10.6 



10. 0.13.1 

 7.2, 8.6 

 8.8. 10.0 



10.5,10.7 



6 42.8 

 6 36.8 

 6 36.7 

 6 55.8 



6 59.0 



7 02.4 



7 14.8 

 7 04.2 



7 24.9 



7 57.4 



8 05.4 



7 49.8 W 

 7 56.3 W 

 7 57.0 W 



7 55.0 W 

 7 59.6 W 



7 59.8 W 



8 00.2 W 



h 

 14.0 

 15.9 



7.8 

 7.7 



10.2 .. 

 13.5 .. 



13.2,15.2 

 9.6,10.9 



14 9,16.2 

 6.2 .. 



8.4 



49 53 . 8 S 

 49 53.3 S 



51 25.2 S 

 51 26.5 S 



53 08.6 S 

 53 09.9 S 



53 16.5 3 

 53 17.4 S 

 53 17.7 3 

 53 18.2 S 



53 17.6 S 



h h 

 10.0,10.7 

 10.6,11.3 



9.8,10.5 

 9.7,10.4 

 16.4,17.2 



17.4 .... 

 16.7,17.3 



8.7, 9.4 

 7.4. 8.2 

 9.9,11.2 



13.4,14.1 

 7.7. 8.4 

 9.4,10.1 



10.6.11.3 

 7.6. 8.2 

 9.2. 9.7 



. 23388 

 .23398 



. 2258S 

 . 22608 

 .22514 



.22223 

 .22139 



.21812 

 .21825 

 .21900 



.22044 

 .22048 

 .22052 



.21018 

 .20974 

 .20970 



13 

 13 

 13 

 13 

 13 

 13 



13 

 13 



13 

 13 

 13 



13 

 13 

 13 



13 

 13 

 13 

 13 



177.2X(78) 

 177.2X(78)' 



177.2X(8) 

 177.2X(78) 



177.2X178) 

 177.2X(7)' 



177.2X(78t 

 177.2X(78) 



177.2X(78) 

 177.2X(78; 



177.2Xf78) 

 177.2X(78) 

 177.2X178) 

 177.2X(78) 



177.2X(78) 



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1 Local disturbance. 



1 13X rejeoted. 



