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    Re: Help W French Surveying Compass With Altitude??
    From: Bill B
    Date: 2005 Apr 27, 14:55 -0500

    > The compass card with the scales are printed in reverse. For a bearing, you
    > view through the black sighting vane with your line of vision into a  circular
    > mirror in which you see the compass card in proper orientation, and through a
    > clear slit in the mirror which acts as the forward sighting vane you select
    > the target. There is what I take to be a brass pendulum which will point to a
    > scale, but to do this, the case has to be placed sideways. Doing that makes
    > viewing through the sighting vane impossible.
    Suspect you need to sight along the edge of the compass to read elevation.
    At least that is the way my Silva Ranger works.  With the Silva, I can
    adjust the mirror lid to read the scale while sighting along the card edge.

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