The Earth Surrounded By Rotating Wheels As It Appears To An Imaginary Observer Looking At It From The Side.
FIGURE 2.
The Earth Surrounded By Rotating Wheels As It Appears To An Imaginary Observer Looking Directly At The South Pole
A War-ship, “when knighthood was in flower”.
How a Compass is Used
HE purpose of a compass is to indicate direction. The relative position of the North Pole to any point on the earth’s surface is called North. We figure all direction from this conception. This geographical North Pole is called the True North. About 800 miles from this True North Pole is a spot which has a strange magnetic attraction. The needle of the magnetic compass, if undisturbed by local influences, points to this spot, and not to the True North Pole. This spot is called the Magnetic North Pole. This mysterious attractive spot is not stationary. It moves about from year to year within a wide circle.
