This psychological change was essential to the birth of the new point of view in science and philosophy. Yet alone it could hardly have produced the new method of knowing. But positive changes in the habits and purposes of life gave objective conformation and support to the mental change. They also determined the channels in which the new spirit found exercise. Newfound wealth, the gold from the Americas and new articles of consumption and enjoyment, tended to wean men from preoccupation with the metaphysical and theological, and to turn their minds with newly awakened interest to the joys of nature and this life. New material resources and new markets in America and India undermined the old dependence upon household and manual production for a local and limited market, and generated quantitative, large scale production by means of steam for foreign and expanding markets. Capitalism, rapid transit, and production for exchange against money and for profit, instead of against goods and for consumption, followed. This cursory and superficial reminder of vast and complicated events may suggest the mutual interdependence of the scientific revolution and the industrial revolution. Upon the one hand, modern industry is so much applied science. No amount of desire to make money, or to enjoy new commodities, no amount of mere practical energy and enterprise, would have effected the economic transformation of the last few centuries and generations. Improvements in mathematical, physical, chemical and biological science were prerequisites. Business men through engineers of different sorts, have laid hold of the new insights gained by scientific men into the hidden energies of nature, and have turned them to account. The modern mine, factory, railway, steamship, telegraph, all of the appliances and equipment of production, and transportation, express scientific knowledge. They would continue unimpaired even if the ordinary pecuniary accompaniments of economic activity were radically altered. In short, through the intermediary of invention, Bacon's watchword that knowledge is power and his dream of continuous empire over natural forces by means of natural science have been actualized. The industrial revolution by steam and electricity is the reply to Bacon's prophecy.