The new attractiue. [electronic resource] : Containing a short discourse of the magnes or loadstone: and amongst other his vertues, of a new discouered secret and subtill propertie, concerning the declination of the needle, touched therewith vnder the plaine of the horizon. Now first founde out by Robert Norman hydrographer. : Heereunto are annexed certaine necessary rules for the art of nauigation: / by the same R.N.