Such study, if properly pursued, tends to free the mind from many foolish prejudices and particularly from an unreasonable partiality for our own country and its customs and methods merely because they are our own, substituting the proper patriotism, which applies the best knowledge, wherever found, to our own necessities. Forestry is an art born of necessity, as opposed to arts of convenience and of pleasure. Only when a reduction in the natural supplies of forest products under the demands of civilization, necessitates a husbanding of supplies or necessitates the application of art or skill or knowledge in securing a reproduction, or when unfavorable conditions of soil or climate induced by forest destruction make themselves felt does the art of forestry make its appearance. Hence its beginnings occur in different places at different times and its development proceeds at different paces. In the one country, owing to economic development, the need of an intensive forest management and of strict forest policies may have arrived, while in another, rough exploitation and wasteful practices are still natural and practically unavoidable. And such differences, as we shall see, may even exist in the different parts of the same country. The origin and growth of the art, then, is dependent on economic and cultural conditions, on various economic development and on elements of environment. The development of the art can only be understood and appreciated through the knowledge of such environment, of such other developments as of agriculture, of industries, of means of transportation, of civilization generally. Hence we find, for instance, that England, located so as to be accessible by sea from all points of the compass and with oceanic shipping well developed, can apparently dispense with serious consideration of the forest supply question. Again, we find that more than a century ago fear of a timber famine agitated not only the dense populations of many European countries, but even the scanty population of the United States, in spite of the natural forest wealth which is still supplying us; and not without good reason, for at that time wood was the only fuel and rivers the only means of transportation; hence local scarcity was to be feared and was not unfrequently experienced when accessible forest areas had been exploited. Railroad and canal development and the use of coal for fuel changed this condition on both continents. Now, with improved means of transportation by land and by sea, the questions of wood supply and of forestry development, which at one time were of very local concern, have become world questions, and he who proposes to discuss intelligently forest conditions and forestry movement in one country must understand what is going on in other countries.