RESULTS OF THE MAGNETIC SURVEY OF FUNAFUTI ATOLL. 



37 



in time for the latest boring, but the latter was necessarily undertaken on the 

 opposite side of the lagoon to that of the greatest magnetic disturbance, which is 

 certainly a matter for regret.* 



In conclusion, it may be remarked that the work which has produced such 

 important results for the special objects for which it was undertaken has not assisted 

 in throwing light upon the nature of the land causing the magnetic disturbances. 



In Tables IT. and III. will be found the results of the observations made both on 

 land and afloat during the stay of the "Penguin" by Captain A. M. Field, R.N., 

 and Lieutenant (now Commander) W. P. Dawson, B.N. 



Table I. — Disturbances from the Normal. 

















Resultant disturb- j 



Station. 



De- 

 clination. 



In- 

 clination. 



Hor. 

 force. 



Vert, 

 force. 



Hor. 

 force to 

 North. 



Hor. 



force to 



West. 



ing force . 



mcl angle. 





















Angle. 



Force. 



No. 1 



-35 



+ 3 



+ 243 



- 39 



+ 314 



+ 329 



314 



455 



9 



+ 3 



- 5 



+ 222 



- 142 



+ 120 



- 67 



29 



138 



„ 3 



- 8 



+ 7 



-604 



+ 296 



-561 



+ 203 



200 



596 



1 " ^ 



+ 33 



- 18 



-199 



- 137 



-232 



-296 



128 



376 



„ 5 



-f 25 



+ 5 



+ 185 



- 17 



+ 146 



-287 



63 



322 



„ 6 



+ 7 



+ 1 



- 52 



+ 29 



- 51 



- 65 



133 



89 



„ 7 



-14 



+ 13 



+ 162 



+ 99 



+ 466 



+ 121 



345 



482 



„ s 



+ 8 



- 6 



+ 60 



- 87 



+ 60 



- 83 



54 



103 





fA 







+ 41 



+ 14 



+ 499 



+ 10 



- 10 



45 



10 





B 



— 



- 9 



-193 



- 36 



-190 



+ 30 



190 



190 



+ J 



c 



— 



+ 144 



+ 318 



+ 1596 



+ 310 



-130 



23 



340 



T - 



D 



— 



+ 34 



-424 



+ 573 



-350 



+ 430 



231 



560 





E 



— 



- 22 



-382 



- 137 



-310 



+ 490 



238 



580 





[F 



— 



- 14 



-179 



- 077 



-150 



+ 210 



235 



260 





^G 



+ 4 

















+ . 



H 



-25 



















-76 

















r 



.K 



-f 5 

















* As the success of the boring in the lagoon depended chiefly on the mooring of H.M.S. " Porpoise " 

 at a spot where she woiild l^e sheltered from wind and currents, it was considered prudent not to place the 

 site for the first bore further from the main island than was consistent with the above requirements, at the 

 same time the site was chosen as near as was practicable to the focus of the eastern region of magnetic 

 disturbance. 



Had time allowed after the completion of the first borings the ship would have been moved to the 

 actual focus of the eastern region of magnetic disturbance, and a bore would have been attempted there 

 also, but as the one week available for the whole work was entirely spent in mooring the ship and making 

 the two bores at the first site, the proposal to bore at the focus had to be abandoned. The western region 

 of magnetic disturbance was too exposed to risk boring there in the first instance. — T. W. E. D. 



t These results were obtained from observations made on a wooden raft and are to be considered only 

 approximate — the inclination disturbances to ± 10', the hor. force to ± 100. 



\ These disturbances were obtained from observations made on board the ship in the lagoon and may 

 be considered correct to + 5'. . 



