DE;pARTMUNT of terrestrial magnetism. 20I 



Schmidt, Potsdam ; Capt. W. v. Kesslitz, Pola, and Messrs. R. L. Faris and 

 J. E. Burbank, Cheltenham. 



South America. — Messrs. C. C. Stewart, Magnetic Observer, and W. C. 

 Hamer, Launch Engineer, left early in June for Manaos, Brazil, to make 

 preparations for the magnetic survey along the navigable rivers of the Ama- 

 zon system. The launch Bl I man, referred to in the general summary above, 

 was received by them at Manaos early in August and at once placed in com- 

 mission. The observations at Manaos being completed, the party left on 

 August 21, 1910, for Iquitos, Peru, where they arrived September 30, 1910, 

 having occupied 19 stations en route. From Iquitos the work will be ex- 

 tended along the Ucayali River as far as is possible into southern Peru, and 

 thereafter along the navigable rivers in northern Peru and Ecuador. At the 

 end of the fiscal year there will have been occupied in all about 30 stations, 

 which will afford very valuable data. This work is being done in cordial 

 cooperation with the existing organizations in the countries penetrated. 



Miscellaneous. — In connection with the operations of the Carnegie, land 

 stations have been established at the following points : Funchal, Madeira ; 

 repeat stations at Agar's Island and Hunt's Island, Bermuda ; repeat stations 

 at Bronx Park and Greenport; Vieques Magnetic Observatory and repeat 

 station on Culebra Island, Porto Rico ; and repeat station at Pinheiro, Brazil. 

 New stations were also established by the Director at Plum Island, Ram 

 Head (Ram Island), and Shelter Island, United States, in order to assist in 

 determining the character and extent of the prevalent local disturbances. 



OCEAN WORK. 



The Carnegie left Falmouth, England, upon the completion of the work 

 there on November 9, 1909, and arrived at Funchal, Madeira, on November 

 24, 1909. Owing to the pronounced local disturbances at Funchal, no stand- 

 ardization observations were made. The longest leg of the first cruise of 

 the Carnegie, viz, between Funchal and Hamilton, Bermuda, was completed 

 between December i, 1909, and January 8, 1910, under very favorable con- 

 ditions. The constants of the instruments were determined at Agar's Island 

 and Hunt's Island and the final leg of the first cruise to New York begun on 

 January 28, 1910. After a very stormy trip, which amply proved the sea- 

 worthiness of the vessel, the Carnegie came to dock in Brooklyn on February 

 17, 1910. 



The alterations in the vessel and additions, found desirable as the result of 

 the first cruise, were completed by the Tebo Yacht Basin Co. in time to 

 permit the Carnegie to set out from Brooklyn upon a three years' circum- 

 navigation cruise on June 20, 1910. In connection with these alterations, 

 which were almost wholly in the auxiliary propulsion plant and its general 

 arrangement, acknowledgment must be made of the cordial and effective 

 assistance rendered by the architect of the Carnegie, Mr. H. J. Gielow; by 

 the constructing firm under the management of Mr. Wallace Downey; by 



