DEPARTMENT OF TERRESTRIAL MAGNETISM. 261 



DETAILS OF OBSERVATIONAL WORK. 



OCEAN WORK. 



The ocean work of the Department has been continued by the 

 Carnegie in the Pacific and Atlantic oceans. At the close of the last 

 fiscal year she was en route from Tahiti to Coronel, where she arrived 

 on November 25. Here the magnetic station established in 1907 by 

 the Explorer, of the United States Coast and Geodetic Survey, was 

 reoccupied. After the necessary land observations had been made 

 for the determination of constants and intercomparisons of instru- 

 ments, the Carnegie proceeded to Talcahuano on December 4, arriv- 

 ing there December 5. At this port, through the courtesy of the 

 Chilean officials, the government dry-dock was used for dry-docking 

 the vessel and carrying out the necessary repairs. While at Talcahu- 

 ano opportunity was given Observers Hewlett and Johnston to visit 

 Dr. Walter Knoche, in charge of the meteorological work for the Chilean 

 Government at Santiago, and to discuss with him methods of work in 

 atmospheric electricity at sea. Subsequently Dr. Knoche visited the 

 Carnegie at Talcahuano and kindly made some further suggestions. 



Leaving Talcahuano December 19, the Carnegie proceeded next 

 to Port Stanley, Falkland Islands, arriving there January 27, 1913. 

 A northwest course was followed to about 26° south latitude and 95° 

 west longitude, thence southwest to about 40° south latitude and 

 107° west longitude, and thence around Cape Horn to Port Stanley. 

 Winds of great strength prevailing for days at tliis port, considerable 

 delay was experienced in the completion of the work, which included 

 a reoccupation of the magnetic station given in the British Admiralty 

 List. Upon one occasion while in the harbor the Carnegie dragged her 

 anchor. Dr. H. M. W. Edmonds was relieved of ocean duty at Port 

 Stanley in order to take charge of the land expedition to Hudson Bay, 

 and Dr. C. C. Craft was assigned as surgeon and magnetic observer. 



The Carnegie sailed from Port Stanley on February 22, 1913, bound 

 for St. Helena, following a great circle route to 46.5° south latitude 

 and 1° east longitude. Along this portion of the passage a number 

 of large icebergs were seen. The track of the Carnegie in 191 1 , as well 

 as that of the Gauss while on her Antarctic cruise, was crossed. The 

 Carnegie was "swung" at sea on March 21, and it was once more 

 found that the magnetic observations (dip and intensity) made on 

 the various headings agreed with each other within the observational 

 errors. Arriving at Jamestown, St. Helena, on April 3, the stop 

 made this time was only long enough to provision the vessel, attend 

 to the accumulated correspondence, and dispatch the observation 

 records to Washington. In order to make the more southerly return 

 passage, as planned from Bahia to St. Helena, before the Sun had 

 reached the summer solstice, the usual shore-work was postponed 



