Directions for ascertaining and counteracting the local attraction of the mariner's compass, by day, and by night, on board all vessels, steamers included, at sea, or in a roadstead, and on land : with cases shewing the necessity of attending to it, for the practical use of navigators, simplified to the capacity of the most humble : to which is added, a few practical hints on the variation of the compass, and the utility of the lead and charts, with illustrations /
by: Fotheringhame, Thomas
Published: (1837)