In: United States Magnetic Declination Tables andIsogonic Charts for 1902.
These charts showed the isogonic lines, but only over the ocean areas.
In this portion of the earth, in northern Asia, between the mountains of Werchojansk, Jakutsk, and the northern Korea, the isogoniclines form a remarkable closed system.
They sometimes have true compasses, and usually have the isogonic lines, or lines of equal magnetic variation, marked on them, from which the variation at any intermediate point can be estimated.
They show on a mercator chart of the world the isogonic lines, or lines along which the variation of the needle from true north is the same.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "isogonic" in a variety of sentences. We hope that you will now be able to make sentences using this word.
