ry A. D., and the cars, carefully preserved in the imperial palace of China, were used in determining the point toward which the main sides of the public buildings should be directed.
It thus appears that the compass was first used by land travelers, which, as Humboldt remarks, is a singular fact.
It was, however, used on board vessels in the Chinese seas in the fourth century A. D. and probably much earlier.
The effect of the loadstone on iron is noticed in a Chinese dictionary, A. D. 121; and another work states that fortune-tellers rub the point of a needle with a loadstone to give it the power of indicating the south.
The Japanese say that at a time corresponding to A. D. 543, the wheel which shows the south was sent to the Mikado from the court of Petsi in Corea.
From China to India was in the natural order of trade, a route which has been followed by many arts, such as the glazing of tiles and pottery, the manufacture of sonorous bronze, gunpowder, etc. When Mahmoud o