538 



KXTKIMTION TO POINT KAltKOW, ALASKA. 



'/ 1 mi da;/ rcailiiiyx of the Jirooke bijitar magnetometer, November 15. 1882. 



Term-day readings of the Brooke bifilar muf/Hetnuietrr, December 1, 1881'. 



Term-day readings of the Brooke bifilar magnetometer, December 15. ].- 



Term -day readings of the Brooke bijilar magiiftometer, January 2, 188;>. 



