TWO:Again, whatever harmony evolution may introduce into our conceptions, whatever hopes it may encourage with regard to the future of our race, one does not see precisely what sanction it gives to morality at present��that is to say, how it makes self-sacrifice easier than before. Because certain forces have been unconsciously working towards a certain end through ages past, why should I consciously work towards the same end? If the perfection of humanity is predetermined, my conduct cannot prevent its consummation; if it in any way depends on me, the question returns, why should my particular interests be sacrificed to it? The man who does not already love his contemporaries whom he has seen is unlikely to love them the more for the sake of a remote posterity whom he will never see at all. Finally, it must be remembered that evolution is only half the cosmic process; it is partially conditioned at every stage by dissolution, to which in the long run it must entirely give way; and if, as Mr. Spencer observes, evolution is the more interesting of the two,105 this preference is itself due to the lifeward tendency of our thoughts; in other words, to those moral sentiments which it is sought to base on what, abstractedly considered, has all along been a creation of their own.

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TWO:Power derived from water by means of wheels is due to the gravity of the water in descending from a higher to a lower level; but the question arises, What has heat to do with this? If heat is the source of power, and power a product of heat, there must be a connection somewhere between heat and the descent of the water. Water, in descending from one level to another, can give out no more power than was consumed in raising it to the higher level, and this power employed to raise the water is found to be heat. Water is evaporated by heat of the sun, expanded until it is lighter than the atmosphere, rises through the air, and by condensation falls in the form of rain over the earth's surface; then drains into the ocean through streams and rivers, to again resume its round by another course of evaporation, giving out in its descent power that we turn to useful account by means of water-wheels. This principle of evaporation is continually going on; the fall of rain is likewise quite constant, so that streams are maintained within a sufficient regularity to be available for operating machinery.FRANCS-TIREURS?

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