They have investigated the phenomena of nature. They have invented ways to use the forces of the world, the weight of falling water--of moving air. They have changed water to steam, invented engines--the tireless giants that work for man. They have made lightning a messenger and slave. They invented movable type, taught us the art of printing and made it possible to save and transmit the intellectual wealth of the world. They connected continents with cables, cities and towns with the telegraph--brought the world into one family--made intelligence independent of distance. They taught us how to build homes, to obtain food, to weave cloth. They covered the seas with iron ships and the land with roads and steeds of steel. They gave us the tools of all the trades--the implements of labor. They chiseled statues, painted pictures and "witched the world" with form and color. They have found the cause of and the cure for many maladies that afflict the flesh and minds of men. They have given us the instruments of music and the great composers and performers have changed the common air to tones and harmonies that intoxicate, exalt and purify the soul. They have rescued us from the prisons of fear, and snatched our souls from the fangs and claws of superstition's loathsome, crawling, flying beasts. They have given us the liberty to think and the courage to express our thoughts. They have changed the frightened, the enslaved, the kneeling, the prostrate into men and women--clothed them in their right minds and made them truly free. They have uncrowned the phantoms, wrested the scepters from the ghosts and given this world to the children of men. They have driven from the heart the fiends of fear and extinguished the flames of hell. They have read a few leaves of the great volume--deciphered some of the records written on stone by the tireless hands of time in the dim past. They have told us something of what has been done by wind and wave, by fire and frost, by life and death, the ceaseless workers, the pauseless forces of the world. They have enlarged the horizon of the known, changed the glittering specks that shine above us to wheeling worlds, and filled all space with countless suns. They have found the qualities of substances, the nature of things--how to analyze, separate and combine, and have enabled us to use the good and avoid the hurtful. They have given us mathematics in the higher forms, by means of which we measure the astronomical spaces, the distances to stars, the velocity at which the heavenly bodies move, their density and weight, and by which the mariner navigates the waste and trackless seas. They have given us all we have of knowledge, of literature and art. They have made life worth living. They have filled the world with conveniences, comforts and luxuries.