Rev. Heys is a minister emeritus in the Protestant Reformed Churches. The tremendously small disease germs that are invisible to the naked eye of man can produce in man a dangerously high fever, severe pain, and as far as some of them are concerned, the realization of certain death. The length, breadth, shape, and weight of such creatures do not count. Likewise a small spark of electricity, or a small match that has been lit near an explosive gas can cause a powerful explosion, great devastation, and fire. Therefore men are warned not to smoke while filling their automobiles with...