EXPEDITION TO POINT BARROW, ALASKA. 



Term-day reading* of the Brooke bijilar Mftgnrtomrtci; .Inminnj 15, 1883. 



530 



reading* of the Jirooke bifilar magnetometer, February 1, 1883. 



o 



10 



15 



JO . 

 H 



30 



33 . 

 40 

 45 



50 . 

 55 



.-, 





P 



III) 41- 



42,- 4)6 

 42<i 4J7 



428 '421! 



10* 11" 



15 420 



:7 410 



425 4:;0 313 



137 : 

 I I 



IS' 



II" 



15" I !' 



1411 312 

 402 219 



HI2 372 



[398 '368 

 (390 401 



3ilS 431 



1398 418 



427 100 



1445 387 



]431 397 



427 II.-2 



i 377 



444 :374 



423 1360 



134 



IT" 



:357 373 



404 366 



S88 315 



385 252 



:i."!i 255 



M>3 242 



1381 ! 217 

 215 



378 



229 



23' 



30 



272 



183 

 271 

 210 

 :ill 

 452 

 HI 



500 



Term-day readings of the Broolce bifilar magnetometer, February 15, 1883. 



Term-day readings of the Broolce bijilar magnetometer, March 1, 1883. 



