Modern Economic Problems - Economics Vol. II | Page 5

is used for residential and commercial purposes, the rest being barren mountains, deserts, swamps, and forests. Of the total in farms a little more than one-half was improved, 478,000,000 acres altogether, a per capita average of 5.2 acres; and a little less than one-half was unimproved, 400,000,000 acres altogether, a per capita average of 4.3 acres. The improved land produced not merely food but many kinds of materials, such as cotton, wool, hides, and lumber, while much of the unimproved land was either in farm wood-lots, or in rough range pasture. Of course the kinds and amounts of produce per acre vary with the climate, particularly with sunshine and rainfall; possibly the proportion of the area of the United States that is true desert and infertile mountain land is greater than that of any other equal area in the temperate zones. The actual productive capacity per acre of the lands of America cannot be expressed in a very helpful way as a general average per acre, but each area must be carefully studied in respect to its climate, rainfall, and possibility of irrigation and drainage. It is evident that a very large number of economic problems must arise in connection with the land supply for food: such as problems of land-ownership, taxation, irrigation, drainage, forestry, and encouragement or limitation of population. We are just beginning to awaken to the needs in this direction.
The rivers, lakes, and ocean waters near our coasts are other great sources of food, but no statistics are available to show adequately their yield. Few of them are in private possession and they do not appear at all in a total of "capitals," yet they are more important to the nation than a large part of the land area. They are only beginning to be developed artificially by the propagation of oysters, clams, and fish. The development of a proper policy in this matter is one of our economic problems.
There were in 1910 (mostly on farms) about 64,000,000 beef and dairy cattle, 60,000,000 swine, 56,000,000 sheep and goats, and there were raised in the one year nearly 500,000,000 fowls of all kinds.
�� 9. #The sources of heat, light, and power#. The law of the conservation of energy expresses the fundamental likeness of heat, light, and power. The principal sources from which man derives these agencies are coal and falling waters, tho wood is of importance as fuel in some localities. About 500,000 square miles of land (about 13 per cent of the area of the country) are underlaid with coal. These deposits are widely distributed, so that nearly every part of the country is within 500 miles of a mine. The enormous deposits if used at the present amounts per year would last probably 2,000 to 4,000 years, but if used at the present increasing rate (doubling the product every ten years) they would, it has been estimated, last but 150 years. What shall be the actual rate as between these extremes is a question whose answer depends on our economic legislation as to ownership, exploitation, prices, use, and substitution. This is another of our important socio-economic problems.
The one great available substitute for coal as a source of heat and light and power is water power. It is estimated that in 1908 but 5,400,000 horse power was being developed from water falls, whereas about 37,000,000 primary horse power[6] was available; but, by the storage of flood waters so as to equalize the flow, at least 100,000,000 horse power, and possibly double that amount, could be developed. As it requires ten tons of coal to develop one horse power a year in a steam engine by present methods, there is here a potential substitute for coal equal to two to four times our present annual use of coal (about 500,000,000 tons in 1912).
But this does not mean that it would be economical, at present costs of mining coal and of building reservoirs, to make this substitution now. To determine when, how far, and by what methods to develop this water power from lakes and rivers for the use of the people and to make this substitution, is another of our great economic problems.
Petroleum and natural gas, of which our original reservoirs were perhaps the richest in the world, are being rapidly exhausted. These may be merely mentioned as being related to coal in the source of their supply, in the nature of their uses, and in the economic problems to which they give rise.
�� 10. #Transportation agencies#. First to mention among the means of transportation are the navigable waters--oceans, lakes, rivers, and canals, with the necessary equipment of dredged inlets, harbors, docks, locks, and lighthouses. Few of these appear in the total of "capitals," for they are not in private possession. Yet a good system of natural waterways