236 re;ports on investigations and projects. 



was swung under favorable conditions for dip and intensity. The observa- 

 tions, made on the various headings in the two domes, again showed smaller 

 differences among themselves than the general accuracy of sea observations. 



Papeete, the principal port of Tahiti, was reached September 11, 1912; 

 on October 15, after completion of the land work, the vessel sailed for 

 Coronel, Chile. 



During the year the Carnegie, in the three passages mentioned, has cov- 

 ered 26,997 nautical miles, obtaining 411 magnetic stations at sea, of which 

 240 were declination stations and 171 were both intensity and dip stations. 

 A general summary of the results is given elsewhere. At the three ports 

 of call the expedition has received most cordial assistance; in particular may 

 be mentioned Dr. W. van Bemmelen at Batavia; Mr. Newton W. Gilbert, 

 Capt. Welker, Father Algue, and Father Sadera Maso at Manila; the Sur- 

 veyor General, Mr. R. R. Rankine, Harbor Master Captain Wooley, and 

 Mr. Joske at Suva; Mr. Leon Gerand, Gouverneur p. i. des Etablissement 

 frangais de I'Oceanie, and Mr. North Winship, U. S. consul at Tahiti. 



Mr. Frary, besides making the chief observations for the ship's position, 

 took part in the magnetic observations, as did also Dr. Edmonds, in addi- 

 tion to his duties as surgeon. The atmospheric electricity observations have 

 been made on board, as opportunity afforded, by Messrs. Johnston and Hew- 

 lett, who also participated in the magnetic work. 



The vessel continued throughout the year under the direct command of 

 Mr. W. J. Peters. At Papeete Dr. C. W. Hewlett joined the vessel as ob- 

 server in place of Mr. Frary, resigned. The personnel of the Carnegie has 

 otherwise remained the same as last year, except that Mr. M. Meisenhelter 

 joined the vessel at Manila as ship's clerk and meteorological observer and 

 Mr. E. Laursen, first watch officer, succeeded at Manila Mr. F. S. McMur- 

 ray, resigned. 



OFFICE WORK. 



The manuscript of the first volume of researches of the Department, 

 giving the results of the land observations since the inauguration of the 

 observational work in 1905 through 1910, has been completed and is now in 

 press. Excellent progress has been made also on the final computations of 

 the ocean observations obtained during the various cruises of both the Galilee 

 and the Carnegie. 



The Director has continued his series of papers in the Journal of Ter- 

 restrial Magnetism and Atmospheric Electricity on the physical theory of the 

 Earth's magnetic and electric phenomena. 



Dr. N. E. Dorsey was appointed a research associate in the Department 

 on March 16, 1912. He has completed an investigation assigned him in- 

 volving a complete theory of the earth inductor, considering in detail (i) 

 the various conditions under which such an instrument can be used for the 

 determination of the inclination; (2) the procedure that must be adopted 



