118 



Land Magnetic Observations, 1911-13 



The 26 stations occupied were as follows : 



1912. 



1. Huacho, Peru Sept. 1. 



2. Matucana, Peru Sept. 14, 15. 



3. La Fundicion, Peru Sept. 17, 18. 



4. Jauja, Peru Sept. 20, 21. 



5. Huancayo, Peru Sept. 23, 24. 



6. Yzcuchaca, Peru Sept. 29. 



7. Acobamba, Peru Oct. 3, 4. 



8. Ayaeucho, Peru Oct. 10, 11, 12 



9. Hacienda Pajonal, Peru Oct. 15, 16. 



10. Andahuaylas, Peru Oct. 19, 20. 



11. Abancay, Peru Oct. 23, 24. 



12. Limatambo, Peru Oct. 28, 29. 



13. Cuzco, Peru Nov. 1, 2. 



1912-13. 



14. Urcos, Peru Nov. 6, 7. 



15. Sicuani, Peru Nov. 9. 10. 



16. Santa Rosa, Peru Nov. 11, 12, 13. 



17. Tirapata, Peru Nov. 14. 



18. Juliaca, Peru Nov. 16, 17. 



19. Puuo, Peru Nov. 19, 20. 



20. Juli, Peru Nov. 23, 24, 25. 



21. Guaqui, Bolivia Dec. 3, 4. 



22. La Paz, Bolivia Dec. 6, 7. 



23. Santa Lucia, Peru Dec. 12, 13. 



24. Pampa de Arrieros, Peru Dec. 15, 16. 



25. Arequipa, Peru Dec. 21, 22, 23. 



26. MoUendo, Peru Jan. 11. 



Nos. 22 and 25 were reoccupations of Mr. Ault's stations. 



The arrival at Cuzco on October 30 ended the traveling by mules from Huancayo, 

 Cuzco being the terminus of the railroad from Mollendo. The trail on the whole was 

 found a difficult one, being exceptionally rough and rocky and at a high altitude; there are 

 many steep ascents over high mountain ranges and corresponding steep descents into the 

 river valleys below. It is especially difficult in the rainy season, which is at its worst in 

 February. No snow was encountered, but some hail and cold weather. The food carried 

 along was often needed, as frequently it was impossible to secure provisions en route. 

 Leaving Cuzco on November 5, the journey was continued by rail to Puno, which was 

 reached on the 18th, 6 stations (with Puno) having been occupied on this trip. With the 

 aid of the government launch, the use of which was obtained through the kindness of 

 the prefect of the Department of Puno, a station at Juli, on the Peruvian shore of Lake 

 Titicaca, was next established. 



On December 2, after sending off journals and accounts and visiting the prefect of the 

 Department of Puno, I left by the steamship Inca for Guaqui. La Paz was reached 

 December 4, and Mr. Ault's station reoccupied on the 6th and 7th. The subsequent sta- 

 tions were as given in the list above. Special mention, however, may be made of the trip 

 to Arequipa and the Harvard Observatory station, where the observer's work was facili- 

 tated in every way by the staff. 



The whole trip from Lima to Mollendo via Huancayo, Cuzco, Puno, La Paz, and 

 .\requipa, during which the 26 stations as listed were established, consumed 117 days, of 

 which 99 days were actual field tune, the remaining 18 days being utiHzed in computing, 

 writing reports, preparing journals and accounts, arranging for trips, etc. The average 

 field time per station was 3.8 days, somewhat high, but due to the fact that a good part of 

 the travel was on mule-back over a hard up-and-down trail, an average of 2.5 to 3 days was 

 required between stations only a little over a day's ride apart in an air line. Owing to the 

 adverse weather, it took a week to establish the station Juli. 



H. R. ScHMiTT, ON Magnetic Work in Chile, January to March 1913. 



In accordance with the Director's instructions of June 27, 1912, the field work was 

 started on January 25, 1913, and was closed March 20, 1913. The instrumental outfit 

 consisted of magnetometer No. 14, marine chronometer No. 1044, pocket chronometer No. 

 244, and watches Nos. 53 and 100. 



The following is the list of stations occupied, arranged chronologically : 



1913. 



11. San Rosendo Feb. 20. 



12. Concepcion Feb. 22, 23. 



13. Coronel :. .- Feb. 25. 



1913. 



1. Arica Jan. 16, 17. 



2. Tacna Jan. 18. 



3. Iquique Jan. 21, 22, 23. 



4. Coquimbo Jan. 26. 



5. Valparaiso Feb. 2. 



6. Santiago Feb. 7. 



7. Rancagua Feb. 10. 



8. Curico Feb. 12, 13. 



9. Linares Feb. 14, 15. 



10. Chilian Feb. 17. 



14. Victoria Feb. 28. 



15. Temuco Mar. 2. 5, 19. 



16. Loncoche Mar. 7. 



17. Corral Mar. 9. 10. 



18. Osorno Mar. 12. 



19. Puerto Montt Mar. 16. 



