"Soon shall thy arm, unconquered steam, afar Drag the slow barge, or drive the rapid car; On, on wide waving wings, expanded bear The flying chariot through the field of air; Fair crews triumphant, leaning from above, Shall wave their fluttering 'kerchiefs as they move, Or warrior bands alarm the gaping crowds, And armies shrink beneath the shadowy clouds." These lines may indeed be fairly interpreted as anticipating in prophetic prediction the modern motor airship, as well as the motor car. THE FIRST STEAM VEHICLES It was considerably later than this that the dream of Dr. Darwin approached to realization at the hands of the steam engine inventors and builders. Aside from Nicholas Joseph Cugnot, the French army officer who, about 1769, constructed an artillery wagon propelled by a high-pressure engine, those who first built successful self-propelled vehicles for highway travel were the famous engineers of England and Scotland, who harnessed steam and developed the high-pressure engine in the last half of the eighteenth century and the first half of the nineteenth. James Watt patented, in 1782, a double-acting engine, which he planned might be "applied to give motion to wheel carriages," the engine to be portable; but he never put the patent to trial. He was followed by George Stephenson, Richard Trevithick, Walter Hancock, Goldsworthy Gurney, David Gordon, William Brunton and others in England, and Oliver Evans, Nathan Read and Thomas Blanchard in the United States, with two score or more contemporaries. For more than half a century steam vehicles of various types were invented by these engineers and many of them were brought into practical use. Soon after the end of the first quarter of the nineteenth century the interest in steam carriages had assumed large proportions in England. In 1833 there were no less than twenty such vehicles, either completed or in hand, around London, and a dozen corporations had been organized to build and run them over stated routes. Alexander Gordon, the eminent engineer, wrote a book, entitled Treatise Upon Elemental Locomotion, that went into three editions inside of four years. He also brought out two special journals covering this field of mechanics. The Mechanic's Magazine, and other publications, also gave much attention to the subject, and the steam-carriage literature of the period became very voluminous. POPULAR PREJUDICE AROUSED