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The ready observator; or an infallible method for determining the latitude at sea: By Altitudes of …
printed for J. Mount, T. Page and W. Mount, on Tower Hill
1778

The ready observator; or an infallible method for determining the latitude at sea: By Altitudes of …
printed for J. Mount, T. Page and W. Mount, on Tower Hill
1778

The ready observator; or an infallible method for determining the latitude at sea: By Altitudes of …
printed for J. Mount, T. Page and W. Mount, on Tower Hill
1778

The ready observator; or an infallible method for determining the latitude at sea: By Altitudes of …
printed for J. Mount, T. Page and W. Mount, on Tower Hill
1778