"Honour thy father and thy mother * * That it may be well with thee, and thou mayest be long on the earth."—Ephesians vi.
Fig. 36.—CARD WITH MOUSE-TRAP.
Fig. 37.—REVERSE OF CARD WITH MOUSE.
847. Why will a bow stretched out of its natural position, propel an arrow through the air?
Because its substance, being highly elastic, the particles thereof seek to restore themselves to their former state, as soon as the resisting power is withdrawn. The force derived from this elasticity, is communicated to the arrow by the string against which it is placed.