The principle in use comprehends the presence of a theoretical magnetic North Pole located northwest of Hudson’s Bay which attracts the blue end of the compass needle from all parts of the northern hemisphere causing it to point in that direction. Should one wish to lay a fairly accurate course, have both hands at liberty, hold the compass in both hands at half arm’s length from body with elbows resting against your sides so as to bring the compass in direct line with the center of your body. To settle the needle quickly tip the compass until the end of the needle touches the glass to check the vibrations. Repeat this quickly two or three times as needle passes the center of the arc it is making. Then carefully level the box to stop the needle from vibrating. When the needle swings free and finally stops the compass can be easily turned until the letter _N_ is under the blue end of the needle and then one has all parts of direction. It is well to remember that the needle is affected by proximity to iron and steel.
Remember, when reading your map that the meridian marked thereon is the true north. Your compass, as just explained, points to the magnetic north. Therefore, you will have to apply a correction to your compass reading, the amount necessary varying as you go east or west of a line which passes, approximately, from Mackinac Island, in Lake Michigan, to Savannah, Georgia. The further east you are of this line the more the north end of your needle will point west of north; the further west you are of this line the more your needle will point east of north, the amount of the deviation amounting to one minute west for each mile east of this line (or 1° for each 60 miles) and one minute east for each mile west of this line.
The catastrophe of getting lost besets almost every lone woods traveler sooner or later and frequently results in a panic as deadly as that which drowns good swimmers. Even trained woodsmen sometimes get “turned around” but they usually find their bearings soon because of the general knowledge of the country and the main landmarks, shapes and heights of mountains, the trend of the ridges, the prevailing winds, the general direction and ultimate outlet of the streams, etc. The danger of getting lost is further offset by a proper knowledge of taking one’s bearings, by range finding, by the knack of traveling by direction and by correct compass reading.