126 



Land Magnetic Observations, 1911-13 



Manaos by the next steamer from New York. Mr. W. C. Hamer, an engineer, was taken 

 with me from the United States, all other helpers being obtained in the field. 



During the G weeks following the arrival of the expedition in Manaos on July 8, the 

 tune was spent in the requisite preparations, securing the necessarj^ credentials and supplies, 

 and in occupj'ing 2 stations in distant parts of the city of Manaos. On August 20, 1910, 

 we were ready to leave Manaos, in the launch, for Iquitos, Peru, which port was reached 

 in the latter part of September, after making observations at 19 stations en route. Owing 

 to the poor operation of the engine and the breaking of some necessary parts, the launch 

 had to be left at Iquitos while awaiting the arrival of the new parts from New York. During 

 this delay, by means of local boats, I made a trip up the Ucayali River, and another to 

 Yurimaguas on the Huallaga River, securing a goodly number of observations. 



The new engine parts arrived from New York about the end of the year and we immedi- 

 ately prepared to continue the work with the launch. However, a few days before the 

 start was planned to be made the launch unfortunately was destroyed by fire. After dis- 

 posing of the remaining supplies and of the hull, I continued the work as was possible 

 with the local conveniences of transportation. A canoe trip was made to the Alto Maranon 

 during the month of February 1911, this completing the work in Eastern Peru, as outlined 

 in my instructions, with the exception of the trip along the lea or Putomayo River, which, 

 for lack of the requisite transportation facilities, had to be given up. 



Magnetic observations were next made at various points between Manaos and the 

 mouth of the Amazon River, and by May a line of stations had been established almost 

 completely across the equatorial part of South Ainerica. After a short illness I made, 

 during May to July, a trip up the Madeira River and occupied various stations along the line 

 of the Madeira and Mamor^ Railroad, which was then under construction. Thereupon, 

 being taken seriously ill, I was compelled to leave the country. Returning to Manaos, 

 I took passage for Pard, intending to change to a south-bound steamer at that port and 

 to continue the work in a more healthful part of South America, but, when Pard was 

 reached, I was too sick to leave the steamer and had to be taken on to Liverpool, where 

 I was placed in a private hospital for about 24 days. I was finally able to sail for the 

 United States on September 16 and reported at Washington as soon thereafter as possible. 



The following stations were occupied in the order named: 



At Nos. 1, 39 and 44, magnetic observations had been made previously; however, 

 only No. 44 could be reoccupied exactly. 



The American consuls at Para and Manaos, especially Mr. Fred Sanford, the acting 

 American consular agent at Manaos, rendered valuable assistance to the expedition. The 

 British consul in Iquitos, Peru, kindly arranged the running of his trading steamer on the 

 Ucayali River so that observations could be more easily made in that region. Messrs. May 

 and Jekyl, the contractors building the Madeira and Mamor6 Railroad, facilitated, in every 

 way possible, the work in the region of their operations. Both the Brazilian and the 

 Peruvian officials rendered whatever aid lay within their power and extended various 

 courtesies. 



