te;rrestrial magnetism — bauer. 239 



March 31 to April 10 was made at this port, during which time all necessary 

 check shore and swing observations were made at the stations occupied on 

 the first cruise. The next stop was made at Pago Pago, Samoan Islands, 

 from April 26 to May i. On account of severe local attraction, as also 

 because of lack of tug facilities, no harbor swings or shore observations were 

 made at this point. At Apia, Samoan Islands, May 2 to 10, comparisons were 

 made between the Galilee instruments and those of the German Observatory 

 in charge of Dr. Franz Linke, to whose kindness and extension of all pos- 

 sible courtesies the Department is indebted. Harbor swings were not made 

 owing to the lack of sufficient tug facilities and to the strong harbor currents. 

 At the next port, Suva, Fiji Islands, comparisons were made between the 

 instruments of the ship and those used by Mr. G. Heirnbrod, magnetic 

 observer in charge of the work on the islands of the South Pacific. Harbor 

 swings were also secured at this point during the stay there between May 

 17 and 26. Jaluit, of the Marshall Islands, wao reached on June 21 and 

 shore and harbor sea . observations were made, after which a course was 

 taken for Guam Island on June 30. During July 11 to 24, harbor swings 

 and shore observations were made at San Luis d'Apra, Guam Island. 

 Thence sail was set for Yokohama, Japan, where the expedition arrived on 

 August 13 last. At this port numerous shore observations as well as harbor 

 swings were made, as also, through the courtesy of Dr. K. Nakamura, in 

 charge of the Central Meteorological Observatory of Tokyo, and of Dr. A. 

 Tanakadate, of the University of Tokyo, comparisons with the observatory 

 standards of Japan were secured. On August 24 the Galilee was blown on 

 the breakwater at Yokohama by a typhoon and such damage sustained that 

 she had to be dry-docked in order to have the necessary repairs made. 

 Fortunately the damage was not very serious and she was enabled to take 

 up her work again on September 6, on which date the expedition left Yoko- 

 hama for San Diego. At the end of the fiscal year the vessel was thus en 

 route to San Diego, upon the arrival at which port, on October 20, she had 

 terminated the second cruise of the Magnetic Survey of the Pacific Ocean 

 and had covered on this cruise approximately 15,000 nautical miles, or a total 

 of 26,000 nautical miles for the two cruises. 



Throughout, observations have been made of the three magnetic elements 

 as frequently as the weather and sea conditions would permit. The pre- 

 liminary reductions indicate that the sea work has attained a high state of 

 efficiency, and that a most satisfactory degree of accuracy has been reached. 

 An article on the instruments, methods, and preliminary results of this work 

 has been published by the director in the June number of the current volume 

 of Terrestrial Magnetism and Atmospheric Electricity, this article being 

 the summary of two addresses delivered before the Philosophical Society 

 of Washington and before the American Physical Society. As soon as the 



