The Bible and the hieroglyphics on the various ruins of ancient Egypt furnish us with the earliest authentic records. In the case of Egypt this is particularly valuable to us, because of the great degree of culture arrived at in the civilised arts. In fact it is the chief country of which we have any record of the progress of these arts, and though not actually established, it is extremely probable that to the Egyptians we owe the invention, or at least the introduction of the wheel. These people were early engaged in the erection of large buildings and monuments, of which the pyramids and sphinxes are such striking examples; and in order to convey the enormous blocks of stone and granite to their ultimate destination, the roller would be the first thing to suggest itself as a means of facilitating transit. The next step would be the formation of a truck, to which these rollers could be attached, and on which could be placed the materials to be moved. Progression with a contrivance of this kind would necessarily be rather slow, but it would soon become apparent that if a larger roller were used the motion could be accelerated. The next improvement would be an endeavour to lighten the rollers by sawing them into thick slices, and connecting them by a horizontal roller of smaller dimensions, giving a rude representation of a wheel and axle. The agricultural carts used by the peasantry of Chili, in South America, were made in this fashion until very recently. The further lightening of these cars would follow almost as a matter of course, by cutting the slices of the trunk to form the wheel, thinner, and further by cutting away portions of this slice, forming spokes. The wheel having arrived at this stage of perfection, the axle would call for a little attention. Up till the present, they would be fixed firmly to the wheels and revolve with them. This arrangement would cause great inconvenience in turning, for one wheel would revolve more rapidly than the other, by reason of the circle described by one wheel in turning round being greater than that of the other, and the vehicle would be liable to overturn. The next step was to arrange that the wheels could revolve independently of the axle. This being done, we have the wheel, in its principles, the same as at present. [Illustration: Fig. 1.—Egyptian Chariot. Fig. 2.—Egyptian Chariot.]