Rare Books

A treatise on the magnet, or, natural loadstone : with tables of the variation of the magnetic needle, for all latitudes and longitudes, observed at different times in the Atlantic, indian, and Pacific oceans, by the following celebrated navigators: ... together with tables of the dip of the needle in different parts of the blobe, and a description of a new-invented meridional and azimuth compass ... to which is been added an appendix