The earth acts like a huge magnet in determining the direction of compass and dipping needles. Its inductive influence, as shown in the last experiment, strengthens the belief that it has such action. If a small dipping needle be placed over the - end of a bar magnet, the needle will take a vertical position with its + end down. As the needle is moved toward the other end of the bar, it turns from its vertical position. When over the neutral line, the needle is horizontal. As it approaches the + end of the magnet, the needle again becomes vertical, but the - end of the needle is drawn down. If a dipping needle be carried from far southern to far northern latitudes, it will act in a similar way. Many facts seem to teach that the earth is a great magnet with magnetic poles near its geographical poles. The magnetic pole in the northern hemisphere was found in 1832 by Capt. Ross. It was then a little north and west of Hudson's Bay, in latitude 70 deg. 05' N., and longitude 96 deg. 45' W. A place in the southern hemisphere has been found where the dipping needle is nearly vertical.