These few examples of the early attempts to solve the problem of mechanical propulsion of vehicles are sufficient to show that the automobile is not entirely a creation of the progressive mind of the latter part of the nineteenth century, but that it engrossed the attention of inventors more than one hundred and thirty years ago. The success attained by the workers in this field at different periods was directly in proportion to the degree to which the form of power used had been perfected at the time. The first inventors attained but slight success, owing to the fact that, in their time, the steam engine was in a crude form, but as the construction of the latter improved, so did that of the vehicles operated by it. Before the days of steam, the power of wind mills was utilized to propel vehicles, and with such success that in the sixteenth and seventeenth centuries wind-propelled wagons or ‘Charvolants,’ as they were called, were very numerous upon the flat plains of the Netherlands. [Illustration: FIG. 10. SCOTT RUSSELL’S STEAM CARRIAGE, MADE IN 1845.] From 1845 up to the early nineties, a period of nearly half a century, very little was done in the way of developing the automobile. From time to time inventors in various parts of the world devoted themselves to the subject, but they were generally looked upon as visionary cranks, and their work attracted little attention. During this period there was an almost universal prejudice against the use of any kind of mechanical power upon the streets or public highways, and it is even possible that if during these years any one had invented a horseless carriage, perfect in every way, he would have failed to obtain proper recognition. Prejudice against mechanically-propelled vehicles has gradually worn away, probably because of the introduction of cable and trolley cars, and at the present time the majority of people desire to see the substitution of mechanical for animal power. As a result of this change in public opinion, self-propelled vehicles are accepted as entirely satisfactory, which a few years ago would have been regarded as failures. Notwithstanding this tolerant feeling, however, it is very doubtful whether the cumbersome coaches of the early part of the century would be received with favor at the present time when taste and requirements are entirely different. What is now desired is a light, fast-running and attractive vehicle, which could not be constructed along the lines followed by the inventors of former days. The automobile of to-day is a far more perfect device than its predecessors, although it can not be said to have reached a state of perfection. As motive power, steam, gasoline and electricity are used. Which of the three is the best, taking all things into consideration, it would be difficult to say, as each one has its defects as well as its advantages, and the evident superiority of each one in a certain direction is offset by deficiencies in other directions.