84 



Results of Land Magnetic Observations, 1905-10 



NORTH AMERICA. 



Central America Continued. 



station 



Cabulco 



Chiche 



Zacapa 



Cape Gracias, . , 



San Marcos. . . . 

 Guatemala City 



Santa Rosita . . . 



San Felipe 



Champerico . . . . 

 Tegucigalpa. . . , 



San Jose (Guatemala) 



San Salvador 



Perspire 



Acajutla 



Prinzapolca 



La Union 



Amapala 



Corinto 



Managua 



Bluefields 



Granada 



San Ubaldo 



San Jorg6 



San Carlos 



Greytown 



Koschny 



Ballena 



Sarchi 



Uvita Island 



Puntarenas 



San Jos6 (Costa Rica) . . . 

 Colon, Quarantine Station 



Colon Harbor. 



Cristobal. 



Latitude 



IS 05 N 



IS 04 N 



14 59.3 N 

 14 58.9 N 



14 58 N 

 14 37.9 N 



14 36.9 N 

 14 35.1 N 

 14 19 N 

 14 03.5 N 



13 42.8 N 

 13 35.1 N 

 13 34 N 

 13 22.2 N 

 13 20.5 N 

 13 17.7 N 

 12 26.9 N 

 12 09.6 N 



12 01.5 N 



11 54.0 N 



U 49.4 N 



U 28.3 N 



11 08.0 N 



10 54.9 N 



10 26.3 N 



10 22.4 N 

 10 06 N 



9 59.9 N 

 9 58 N 

 9 57 N 

 9 21.8 N 



921.4N 



Long. 

 East 

 of Gr. 



269 28 

 269 02 



271 30 

 276 45 



268 16 



269 30 



269 34 

 268 26 

 268 08 



272 47 



269 13 



270 49 

 272 39 

 270 10 

 276 21 

 272 09 

 272 21 



272 48 



273 42 



276 15 



274 03 

 274 40 



274 14 



275 14 



276 18 

 275 34 



274 32 



275 39 



277 00 

 275 08 

 275 56 

 286 06 



280 03 



Date 



Apr 2, '07 

 Apr 3. 07 

 Apr 4. 07 

 Apr 5. 07 

 Mar 20, 07 

 Apr 15, 09 

 15,09 

 9,07 

 2,09 

 2,09 

 Mar 24, 07 

 Apr 12,07 



Apr 

 Apr 

 Jul 

 Jul 



Apr 

 Jun 

 Jun 

 Jun 

 Apr 

 Apr 

 Apr 

 Jun 

 Jun 

 Jun 

 Jun 

 Jun 

 Jun 

 Jun 

 Jun 

 Apr 

 Apr 

 Jun 

 Jun 

 Jun 

 Jun 



13,07 

 3,09 

 3,09 

 4,09 

 15.07 

 16,07 

 23,07 

 27,09 

 27, 09 

 20,09 

 21,09 

 8,09 

 8, 09 

 23, 09 

 23,09 

 17,09 

 18,09 

 11,09 

 12,09 

 14,09 

 15,09 

 May 22,09 

 May 23,09 

 May 6, 09 

 May 6, 09 

 May 7,09 

 Apr 22,09 

 Apr 23,09 

 May 9, 09 

 May 9, 09 

 May 14, 09 

 May 15,09 

 May 11,09 

 May 11,09 

 May 3,09 

 May 4, 09 

 Apr 26, 09 

 Apr 27,09 

 May 20, 07 

 May 21,07 

 May 26, 07 

 May 18.07 

 May 19,07 

 May 14,07 

 May 24,07 

 May 17,07 

 Apr 7,09 

 Apr 7,09 

 Apr 8, 09 

 May 5.07 

 Jul 20, 08 

 Apr 14, 09 

 Mar 14,05 

 Mar 30,05 

 Jun 15,07 



Local Mean Time Value 



Declination 



Inclination 



h 

 17.9 



17.2, 18.0 .. 



9.2, 

 9.1, 



10.2 



11.4. 11.6 



16.1, 



9.2, 



17.1 



11.1, 11.4 



10.5, 

 9.8, 



16.9, 

 9.1 



1 1 .4 . . 

 10.9 .. 

 17.8 .. 



9.0. 

 16.9, 



11.0 .. 

 17.8 .. 



9.3, 9.6, 11.4 



8.6, 10.6, 11.4 

 8.9, 10.9 



9.0, 11.4 ... 

 15.8, 17.6 ... 



8.2, 10.3 



8.4, 10.4 



8.6, 10.4 



8.9, 11.0, 11.2 



8.9, 10.8 . . 

 14.8, 16.8 .. 



8.2, 10.2 .. 

 9.1, 11.2 .. 



9.2, 11.2 

 15.4, 16.4 



8.9, 10.0 

 17.5, 18.1 



12.5, 13.6 



15.8, 16.8 



9.5, 10.6, 15.0 



10.4, 14.2 



12.6, 13.6 



14.2, 15.9 



13.1 



13.2, 14.8 



7.6 to 17.2 (d.v.) 

 15.0, 15.9 



L. M.T. 



6 11.1 E 



5 57.6 E 



6 01.8 E 

 4 32.7 E 



6 10.6 E 

 6 33.8 E 



6 15.3 E 

 6 08.2 E 

 6 34.2 E 

 5 40.4 E 



5 37.2 E 



6 29.6 E 



6 40.3 E 



5 30.9 E 



6 27.6 E 



6 31.4 E 

 4 44.6 E 



5 27.6 E 



5 09.1 E 



6 18.8 E 

 5 32.5 E 



5 30.9 E 

 5 05.8 E 



5 52.9 E 



5 18.4 E 

 5 43.4 E 



4 58.0 E 



5 11.6 E 

 4 56.2 E 



5 38.9 E 

 5 47.4 E 



4 53.6 E 



5 35.2 E 

 5 17.7 E 

 4 03.2 E 



4 45.9 E 

 4 47.0 E 

 4 46.3 E 

 4 32.2 E 

 4 29.4 E 

 4 28.3 E 



6.5 



6.6 

 11.3 

 13.4 



14.9 

 13.6 



13.2 

 13.1 

 16.2 

 13.7 



6.5 

 16.4 

 7.3 



14.3 

 13.8 

 13.5 



9.6 

 15.1 



14.3 

 13.5 



13.7 



9.2 

 13.7 



14.4 

 13.4 



13.7 

 13.6 



8.8 

 7.3 



6.3 

 14.5 

 12.2 

 12.2 



9.8, 13.4 



14.6 



12.7 



14.8 



10.8 



16.6 .. 



Value 



40 27.5 N 



40 14.2 N 

 40 32.1 N 

 42 19.4 N 



39 56.1 N 



40 09.8 N 



39 56.3 N 



40 04.0 N 



38 59.5 N 



39 59.3 N 



39 07.0 N 

 39 09.2 N 

 39 06.4 N 



38 07.5 N 



38 50.7 N 



39 06.2 N 



39 57.6 N 

 37 18.4 N 



37 12.9 N 

 37 23.4 N 



37 26.5 N 



38 23.7 N 

 37 02.1 N 



37 20.8 N 

 36 13.8 N 



37 05.4 N 

 35 52.4 N 



34 27.2 N 

 33 52.5 N 



34 23.8 N 



34 11.8 N 



33 36.9 N 



34 18.3 N 



34 31.7 N 



34 11.8 N 



34 30.4 N 



34 32.5 N 



33 50.6 N 



34 13.4 N 



Hor. Intensity 



L. M.T. 



h 

 18.1 



17.4, 17.8 



9.5. 10.0 



9.6. 10.7 



14.4 (wt.5) 

 16.4, 16.8 



9.7. 10.6 

 14.6 (wt.l) 

 10.7, 11.2 

 10.0, 10.6 

 17.2, 17.5 



14.6 (wt.5) 

 9.5, 10.4 

 17.1, 17.6 



10.1, 11.0 

 8.0 (wt.J) 



15.2 (wt.i) 

 9.2, 10.1 



9.4, 10.4 

 14.9 (wt.J) 



9.5, 10.6 

 14.6 (wt.J) 



16.3, 17.1 

 10.4 (wt.^) 

 15.9 (wt.5) 



8.8, 9.7 



15.1 (wt.j) 



8.9, 9.8 

 14.4 (wt.5) 



9.1, 9.9 



9.6, 10.5 

 14.6 (wt.J) 



9.4, 10.3 



15.4, 16.3 



10.2 (wt.J) 

 9.8. 10.8 



15.0 (wt.J) 



8.7, 9.7 



9.7, 10.7 

 14.3 (wt.J) 

 14.6 (wt.J) 

 11.2, 12.4 

 14.6 (wt.J) 



9.8, 10.6 

 15.7. 16.2 



9.3, 

 17.8 



9.7 



12.8, 13.4 



16.0, 16.5 



9.8. 10.3 



11.0, 12.6 



13.3 



12.9, 13.4 



14.7, 15.4 

 13.6 



13.8, 14.4 



15.3, 15.7 



Value 



r 



.33274 



.33199 



.33248 

 .32299 



.33116 

 .32942 

 .SS887 

 .33064 

 .33329 

 .33652 



.S2920 

 .32910 

 .33343 



.33334 

 .SSS4 

 .SS261 

 .33329 

 .33414 

 .SS430 

 .33248 

 .SS2SS 

 .32538 

 .32569 



.33304 



.32936 

 .32988 

 .SSliS 

 .33214 

 .32968 

 .32937 

 .32984 

 .32661 

 .32606 

 .33092 

 .33067 



.32718 

 .33253 

 SS258 

 3S00S 

 .33042 

 .S29J,S 

 .33006 

 .33154 



.33150 

 .33079 



.33179 

 .33078 

 .33288 

 .32682 

 .32666 



.32670 

 .32574 

 .32506 

 .32807 



.32756 



Instruments 



Mag'r Dip Circle 



20 



20 



7 



172 



20 



7 



172 



20 



20 



20 



7 



172 



7 



20 



7 

 172 

 172 



7 



7 

 172 



7 

 172 



7 

 172 

 172 



7 

 172 



7 

 17 i 



7 



7 

 172 



7 



7 

 172 



7 

 172 



7 



7 

 172 

 172 



7 

 172 



7 

 20 



20 

 20 



20 



20 



20 



9 



9 



20 

 4 

 9 

 19 

 19 

 20 



177.1256 



177.1256 

 177.1256 

 172.12 



177.1256 

 172.12 



177.1256 

 177.1256 

 177.1256 

 172.12 



177.1256 

 177.1256 

 172.12 



172.12 



172.12 



172.12 



172.12 

 172.12 



172.12 



172.12 



172.12 

 172.12 



172.12 



172.12 



172.12 



172.12 



177.1256 

 177.1256 



177.1256 

 177.1256 

 177.1256 

 177.1256 



178.1256 



177.1256 



189.56 



178.1 



171.12 



177.1256 



Obs'r 



JAF 

 JAF 

 JAF 

 JAF 

 JAF 

 WHS 

 WHS 

 JAF 

 WHS 

 WHS 

 JAF 

 JAF 

 JAF 

 WHS 

 WHS 

 WHS 

 JAF 

 JAF 

 JAF 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WKS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 WHS 

 JAF 

 JAF 

 JAF 

 JAF 

 JAF 

 JAF 

 JAF 

 JAF 

 EK 

 EK 

 EK 

 JAF 

 HWF 

 EK 

 J PA 

 J PA 

 JAF 



