EXPEDITION TO POINT 15A1UIOW, ALASKA. 

 Term-day readings of the Brooke bijilar magnetometer, May 15, 1883. 



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Term-day readings of the Brooke bijilar magnetometer, June 1, 1883. 



Term-day readings of the Brooke bijilar magnetometer, June 15, 1883. 



Term-day readings of the Brooke bijilar magnetometer, July 1, 1883. 



