Home
Credits
Links
RSS News
Share
Contact

 

    Return to...
GeographyMapping Unknown Lands
Declination
Estimating Distances
 

William Clark's Compass



his is the actual compass, with a paper dial (note the tear across the dial), carried by William Clark on the Expedition. The compass is in a hinged box that can be closed to protect the compass face and is small enough to be carried in a large pocket. The compass ring showing degrees on the outside of the dial can be rotated to adjust the instrument for declination.

--John Logan Allen

Declination
Estimating Distances


 
From Discovering Lewis & Clark ®, http://www.lewis-clark.org © 1998-2014
by The Lewis and Clark Fort Mandan Foundation, Washburn, North Dakota.
Journal excerpts are from The Journals of the Lewis and Clark Expedition, edited by Gary E. Moulton
13 vols. (Lincoln: University of Nebraska Press, 1983-2001)