TWO:The latter seems a plausible theory, and perhaps a correct one; but there are two facts in connection with the operation of reaction water-wheels which seem to controvert the latter and favour the first theory, namely, that reaction wheels in actual practice seldom utilise more than forty per cent. of useful effect from the water, and that their speed may exceed the initial velocity of the water. With this the subject is left as one for argument or investigation on the part of the reader.The unhappy man bowed his head trembling,247 and with dull resignation he left the office, strongly escorted.
TWO:Every great system of philosophy may be considered from four distinct points of view. We may ask what is its value as a theory of the world and of human life, measured335 either by the number of new truths which it contains, or by the stimulus to new thought which it affords. Or we may consider it from the aesthetic side, as a monumental structure interesting us not by its utility, but by its beauty and grandeur. Under this aspect, a system may be admirable for its completeness, coherence, and symmetry, or for the great intellectual qualities exhibited by its architect, although it may be open to fatal objections as a habitation for human beings, and may fail to reproduce the plan on which we now know that the universe is built. Or, again, our interest in the work may be purely historical and psychological; we may look on it as the product of a particular age and a particular mind, as summing up for us under their most abstract form the ideas and aspirations which at any given moment had gained possession of educated opinion. Or, finally, we may study it as a link in the evolution of thought, as a result of earlier tendencies, and an antecedent of later developments. We propose to make a few remarks on the philosophy of Plotinus, or, what is the same thing, on Neo-Platonism in general, from each of these four points of view.
