94 



Results of Land Magnetic Observations, 1905-10 



SOUTH AMERICA. 



Guiana Concluded. 



Station 



Tumatumari . . . 



Saint Jean .... 

 Kangaruma. . . 



Oreala 



sle Royal 



Isle Royal, B. . 



Tukeit 



Kaieteur Falls. . 



Sault Hermlna* 

 Brownsweg .... 



Cayenne 



Regina 



Latitude 



5 24.0 N 



S 23.6 N 



5 22 N 

 5 19.0 N 

 5 16.7 N 

 5 16.7 N 

 5 13 N 

 SUN 



5 08.1 N 

 5 00 N 



4 56 N 



4 18.8 N 



Long. 

 East 

 of Gr. 



30100 



305 56 

 300 46 

 302 38 

 307 26 

 307 26 

 300 33 

 300 31 



305 38 

 304 50 



307 39 



307 56 



Declination 



Local Mean Time Value 



h h 



17.2 



9.9 



9.4. 11.0 



15.4 



7.0, 

 16.6, 

 9.2 



8.3 

 17.6 



9.3, 

 10.1, 



10.0 

 11.4 



6.6, 7.9 

 12.8, 14.0 



9.4 



12.3 



1 29.2 W 

 1 27.8 W 



4 46.0 W 



1 42.4 W 



2 38.0 W 



5 05.6 W 

 4 58.0 W 



1 18.5 W 

 5 19.4 W 



3 40.2 W 

 6 02.6 W 

 6 00.8 W 

 6 02.1 W 



Inclination 



L. M.T. 



h 

 13.5 



15.8 

 18.0 

 6.2 

 10.7 



7.6 

 12.9 

 16.8 



15.2 

 11.2 



Value 



33 03.4 N 



33 40.4 N 



33 25.0 N 



33 23.7 N 



33 21.7 N 



32 55.8 N 



33 46.0 N 

 32 58.8 N 



33 49.2 N 

 32 36.4 N 



Hor. Intensity 



L. M. T. Value 



h 

 17.6 

 10.2. 



9.9. 

 15.7, 



7.4, 

 16.9, 



10.7 

 10.6 

 16.3 

 8.0 



17.4 



17.1, 

 17.2 

 9.6 

 10.5. 



17.7 



6.9, 

 13.2, 



7.5 

 13.7 



r 



.30075 

 .30175 

 .29721 

 .30009 

 .30132 

 .29648 



.30264 

 S0189 

 .30237 

 .29112 



.29835 

 .29482 



.29302 



Instruments 



Mag'r Dip Circle 



4 

 4 

 4 

 4 

 4 

 4 



1S9 

 4 



189 



' 4 



4 



4 

 4 

 4 



4 



189.69 



189.369 

 189.3 

 189.3 

 189J69 



189.69 

 189.69 

 189.69 



189.69 



189.3 



Obs'r 



HWF 

 HWF 

 HWF 

 HWF 

 HWF 

 HWF 

 HWF 

 HWF 

 HWF 

 HWF 

 HWF 

 HWF 

 HWF 

 HWF 

 HWF 

 HWF 



Peru. 



Iquitos 



Amazon 18 



Amazon 19 



San Jorge 



Amazon 17 



Nauta 



Avispa 



FUadelfia 



Condor Conqui 



Yurimaguas I* 



Yurimaguas II* 



Delicia 



Petronela 



Petronela, dip station 



Canturaayo 



Masisea 



Masisea, dip station. 



Sheshea 



Sempaya 



San Lorenzo Island . . 



San Lorenzo Island 2 



li h 

 7.0, 8.0 



10.1, 11.1 

 16.0, 16.8 

 17.3 



9.6. 

 9.4 

 6.6 

 13.6 



10.6 



8.4, 9, 

 8.5 ... 

 8.4 . . . 



7.3 

 15.2 



7.2, 

 12.0, 



8.1 

 14.0 



6 04.4 E 



5 05.6 E 



5 10.5 E 



6 16.1 E 

 4 47.4 E 

 6 03.6 E 

 6 35.9 E 

 6 07.9 E 



7 19.8 E 



5 43.7 E 



6 41.5 E 



7 00.2 E 



7 11.5 E 

 7 02.6 E 



7 52.9 E 

 9 17.6 E 



9 16.8 E 



9 19.6 E 



7.0 



9.2 

 15.0 

 17.7 



8.9 

 10.3 



6.3 

 13.3 

 11.5 



7.9 .. 

 10.0 . . 

 9.3 .. 



9.6 .. 

 9.1 .. 



8.4 

 18.3 



9.2 

 16.6 

 11.3 



12.5. 13.4 

 15.6 (wt.J) 



14 U.ON 



15 18.4 N 

 14 42.6 N 



13 47.3 N 



14 56.1 N 

 12 35.8 N 

 11 35.3 N 

 10 09.6 N 



9 30.5 N 



9 04.1 N 

 8 53.2 N 

 8 58.3 N 



7 16.7 N 

 6 40.7 N 



4 41.2 N 



3 26.5 N 



3 12.6 N 



3 27.8 S 



3 26.9 S 



3 16.0 S 

 3 10.9 S 



177.125 



177.1256 



177.1256 



177.1 



177.1256 



177.1256 



177.56 



177.12 



177.56 



177.125 

 177.125 

 177.12 



177.56 

 177.1256 



177.12 



177.1 



177.1256 



178.12 



178.12 



178.12 

 169.12 



CCS 

 CCS 

 CCS 

 CCS 

 CCS 

 CCS 

 CCS 

 CCS 

 CCS 

 CCS 

 CCS 

 CCS 

 CCS 

 CCS 

 CCS 

 CCS 

 CCS 

 CCS 

 CCS 

 CCS 

 CCS 

 G III 

 G III 



GUI 

 GUI 

 GUI 



G III 



Venezuela. 



Caracas . 



Sep 1,'05 



h h 

 15.4, 16.9 



1 02.0 E 17.5 



38 27.8 N 15.8, 16.5 



r 



.31045 



17 



18.56 



DCS 



Local disturbance. 



