240 REPORTS ON INVESTIGATIONS AND PROJECTS. 



second cruise has been completed and all of the control observations have 

 been made, the final reduction and publication of the work of the two cruises 

 will be undertaken. 



The need of the ocean magnetic survey, viewed from a practical as well 

 as a scientific standpoint, is most emphatically shown by the comparison of 

 the charted and observed values of the magnetic elements contained in the 

 article referred to above. Thus, the present isogonic charts of the Pacific 

 Ocean show values too small between San Francisco and Honolulu by 

 amounts ranging from 1° to 2° ; the isoclinic charts, values too low by about 

 1°, while the charts of lines of equal horizontal intensity give uniformly 

 too high values on the average of one twenty-fifth part. 



While the deviation coefficients of the Galilee have been found to be 

 smaller than those of any vessel thus far engaged in oceanic magnetic work, 

 the need of a specially constructed, non-magnetic, auxiHary-powered sailing 

 vessel has become more and more patent as the work has progressed. With 

 such a vessel the cost of maintenance and operation would be reduced and 

 results of the desired accuracy be obtained with much less labor than is 

 possible when consideration must be paid to the determination of deviation 

 corrections. 



B. — Land Work. 



China. — Dr. C. K. Edmunds, the magnetic observer in charge of the work 

 in China, has executed during the past year valuable series of observations. 

 Through the courtesy of Dr. W. S. Doberck, the director of the Hongkong 

 Observatory, and that of the governor of Hongkong, he secured the loan 

 of a Kew dip circle and magnetometer with tripods and theodolite, which, 

 with remainder of outfit supplied him by the Department, enabled him dur- 

 ing January and February to carry out a magnetic survey of Hainan Island. 

 Standardization observations were made at Kowloon (Hongkong Observa- 

 tory) both before and after the trip. Eight stations were occupied on the 

 island of Hainan and vicinity as follows : Hoihow, Cape Kami (Lei Chan 

 Peninsula, Kwangtung Province), Hiongpo, Yaichau, Yulinkan, Eeong Sui, 

 Kacheck, and Honglok (near Canton, Kwangtung Province). The region 

 thus covered was, magnetically speaking, unexplored. Dr. Edmunds reports 

 that several of his stations have never before been visited by a Caucasian. 

 On the completion of this campaign Dr. Edmunds returned to his duties at 

 the Canton Christian College. 



In May Dr. Edmunds, through the courtesy of Father J. de Moidrey, 

 director of the Zi-ka-wei Observatory, secured the loan of the small French 

 instruments belonging to the observatory. During the latter part of ]May 

 he made the necessary comparisons at the Hongkong Observatory between 

 the Kew instruments used in the Hainan work and the French instruments. 



