182 



Land Magnetic Observations, 1914-20 



On September 20 the opportune arrival of a river steamer enabled us to reach Manaos 

 September 24, where passage was secured direct to New York on a steamer which made 

 a stop at Para sufficient to allow the reoccupation of the secular-variation station at 

 Pinheiro. I returned to the Office on October 17, after an absence of 220 days during 

 which 38 stations had been occupied. 



Table 28 gives a list of the points occupied, together with dates and geographic 

 positions; the magnetic data are given in the Table of Results. 



Table 28. 



No. 



Name 1 



3 

 4 

 5 

 6 

 7 

 8 

 9 

 ID 

 11 

 12 

 13 

 1-1 

 15 

 16 

 17 

 IS 

 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 27 

 28 

 29 

 30 

 31 

 32 

 33 

 34 

 35 

 36 

 37 

 38 



Caracas 



Villa de Cura 



Ortiz 



Calaboza 



Mcdana del Burro 



San Fernando de Apure. 



Apure River 



La Crbana 



Guaramaco 



Mala de Guanabano. . . . 



Meta River 1 



Meta River 2 



Meta River 3 



Meta River 4 



Orocue 



< ul.iti' de Pupures 



Remolino de Migel. . . . 



Barrigon 



Villa Viceneia 



Bogota 



Veiva 



Guadalupe 



Florencia 



Bella Vista 



La Victoria 



El Baradero del Mieaya 



La Reforma 



El Jubineto 



El Encanto 



Boca del Tupache 



Putumayo 1 



Putumayo 2 



Putumayo 3 



Putumayo 4 



Putumayo 5 



Santo Antonio do lea. . 



Manaos, II 



Pinheiro, A 



Date 



1914 



Mar. 23 



" 26 



" 29 



1 



3 



Apr. 



May 



June 



July 



Aug. 



Sep. 



Oct. 



15 



17-18 

 23 

 28-29 



4 



9 

 13 

 17 

 23 

 29-30 



4 



8 

 13 

 26 



8 

 14 

 18 

 22 

 24 



2-1 

 17 



22-23 

 28 

 31 



1-2 



5 



8 

 11 

 14 



17-18 

 25 



1 



Latitude 



30. 4N 

 02. 2N 

 37. 5N 

 56. IN 

 24 . 6N 

 53 9N T 

 39. 8N 

 08. 3N 

 14 6N 

 12. 2N 

 II) sX 

 02. 5N 



36. 6N 

 21. 9N 

 47. 8N 

 28. ON 

 17. 2N 

 10. 4N 

 08. 9N 



37 . ON 

 55. 5N 

 01. 3N 

 36. 3N 

 09. 5N 

 44 . ON 

 22 . 6N 

 03. 7S 

 00 2S 

 37. 7S 

 21. 2S 

 11 IS 

 17. 3S 

 39. OS 

 52. 5S 

 58. 5S 

 06. 2S 

 07. 6S 

 17. 9S 



Long. East 



293 04 



292 30 



292 43 



292 34 



292 25 



292 32 



293 17 

 293 01 

 292 33 

 291 47 

 291 13 

 290 29 

 289 54 

 289 26 

 288 46 

 288 12 

 287 29 

 287 04 

 286 29 

 285 54 

 284 35 



283 59 



284 04 

 284 11 

 284 27 

 284 06 



284 15 



285 30 



286 29 



287 04 



287 52 



288 54 



289 36 



290 27 



291 02 



292 00 

 299 58 

 311 31 



The stations are located in the following countries: Nos. 1 to 9, Venezuela; 

 No^. 10 to 27, Colombia; Nos. 28 to 33, Peru; Nos. 34 to 38, Brazil. 



The average time in the field was about 5 days for each station; this average was 

 rather high because of slow travel up the Meta River; the roundabout route necessary 

 from the Rio Caqueta to the Rio Putumayo, and the delay in making the portage increase 

 the average. The total distance traveled was approximately 9,800 miles, of which 6,350 

 miles were to and from field and 3,450 miles in field, making an average field travel for 

 each station of 91 miles. The average field expense for a station was about $51. 



No marked local disturbances were found, but near the Andes the values appeared 

 more irregular than on the more level land to the eastward. 



Throughout the entire trip, United States officials, local government officials, and 

 private individuals were all very courteous and helpful. 



