266 CARNEGIE INSTITUTION OF WASHINGTON. 



weather prevented connecting the work on the outgoing trip with 

 that on the return at any station till Lac Seul was again reached. 

 From here the party returned to Fort William, where the Canadian 

 station of 1910 was occupied, and then proceeded to Ottawa. There 

 several sets of observations were made for the purpose of comparing 

 the instruments of the Department with those of the Canadian 

 Magnetic Survey. Then followed the return to Washington, where 

 the party arrived on October 25. 



The main part of the field-work comprised the canoe route of 

 approximately 2,000 miles, of which over 500 miles was over an 

 unsheltered open coast; 37 separate stations were occupied and 1 

 old station was reoccupied. It required the constant strenuous 

 physical exertions of every member of the party to complete the trip 

 during the open season. 



South America. — Three parties have been engaged during the year 

 in magnetic-survey work in South America. Observer H. R. Schmitt 

 was on field duty in Peru, Bolivia, and Chile until April 26, 1913, 

 when he reported on board the Carnegie for ocean duty. He occu- 

 pied 12 stations in Peru, 2 in Bolivia, and 21 in Chile. During 

 March to April he instructed and trained an observer who, it is 

 expected, will undertake field-work for the Chilean government. 



Observer A. D. Power by September 17 had occupied 31 stations 

 in Venezuela, 1 in Colombia, 1 in Curagao, 1 in Trinidad, and 13 in 

 Brazil. Mr. Power was ill with fever from December 28 to January 

 26, but by March he had sufficiently recuperated to permit the 

 continuation of his work and preparation for an expedition up the 

 Orinoco River and thence to Manaos, Brazil, via the Rio Negro. He 

 left Port of Spain, Trinidad, on May 27, and arrived safely at Manaos 

 on August 16. From Manaos Mr. Power continued his expedition via 

 the Rio Negro and Rio Branco, across the frontier into British Guiana, 

 and thence via the Essequibo River system to Georgetown. His total 

 number of stations during the year will be about 70. 



Observer H. F. Johnston was relieved of duty on board the 

 Carnegie on May 17 and has since continued in the field in Brazil, 

 Argentina, Paraguay, and Uruguay. By September 9 he had occu- 

 pied 6 stations in Brazil, 13 in Argentina, 11 in Uruguay, and 8 in 

 Paraguay. During May he secured comparisons with the field in- 

 struments of the Brazilian government at Vassouras, and during 

 June with the standard instruments at the Pilar Magnetic Observa- 

 tory, Argentina. He reached Villa del Pilar, Paraguay, at the end 

 of the fiscal year. He will continue up the Paraguay River and thence, 

 if possible, along the Madeira and Amazon Rivers to Manaos, con- 

 necting there with the work of 1910 and with Mr. A. D. Power's 

 series of stations. By the end of the fiscal year he had occupied 38 

 stations. 



