DEPARTMENT OF TERRESTRIAL MAGNETISM. 155 



completion of the shore work, proceeded on January 24 to Tahiti, arriving 

 there January 31. During a stay of nineteen days at this port, harbor swings 

 and land observations were carried out in detail. The next stop was made 

 at Apia, Samoan Islands, where, between March 3 and 14, various stand- 

 ardizations and comparisons of instruments were made at the Apia Magnetic 

 Observatory. This is now the second time that these highly essential obser- 

 vations and checks on the ship instrumental constants were obtained at this 

 important observatory, established under the auspices of the Gottingen 

 Academy of Science. The present observer-in-charge, Dr. G. Angenheister, 

 as well as the retiring observer-in-charge, Dr. F. Linke, rendered the Galilee 

 all requisite assistance. However, harbor swings with the Galilee could not 

 be attempted at this port. 



Leaving Apia March 14, Yap Island was made on April 14. Here various 

 observations and swings consumed nine days. Sailing from Yap Island April 

 23, Shanghai was reached on May 8, and the principal stop was made. 

 Comparisons of the Galilee instruments were made with the standard instru- 

 ments of the Zi-ka-wei Observatory, the Director, Father J. de Moidrey, 

 S. J., furnishing every facility possible. Swings of the vessel, on account 

 of the high tides and absence of all auxiliary motive power on the Galilee 

 could not be made here in port, but had to be undertaken directly after 

 leaving Shanghai on May 31, and they were even then secured with great 

 difficulty and consumed two days. 



From Shanghai Mr. Peters was directed to proceed with the vessel due 

 east towards Midway Island, putting in port there, if conditions did not 

 make the same hazardous with an all-sailing vessel, and from thence to make 

 Sitka, in order to cover this passage during as favorable a part of the year as 

 possible. However, tempestuous weather was encountered on almost the 

 entire trip, blowing the vessel out of her set course, preventing swings or 

 rendering impossible magnetic declination observations because of absence 

 of sun or stars, so that the course and program of work outlined could be 

 followed only approximately. For about 750 nautical miles from Shanghai 

 the course was practically about the same as that of the Challenger, and no 

 landing on Midway Island could be safely attempted. After following a 

 generally easterly course to longitude 181.5° east, latitude 37° north, course 

 was laid directly for Sitka, the Galilee entering this harbor July 14, 1907. 

 In spite of the bad weather the trip of 5,400 nautical miles was made in 45 

 days, averaging about 120 nautical miles per day. 



The Director met the Galilee at Sitka on July 28, inspected the work and 

 instrumental outfits, and discussed with the commander the future work. 

 Some instrumental changes were made, consisting chiefly of newly received 

 Lloyd Creek dip circle 189 and a new Richie liquid compass fitted with a 

 deflecting arrangement, devised by the Department, for determining directly 

 the horizontal component of the earth's magnetic intensity. Furthermore, a 

 spare gimbal stand was mounted for the purpose of attempting certain atmos- 



