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THREE:Although a system but recently developed, the employment of hydraulic machinery for transmitting and applying power has reached an extended application to a variety of purposes, and gives promise of a still more extensive use in future. Considered as a means of transmitting regularly a constant amount [54] of power, water apparatus is more expensive and inferior in many respects to belts or shafts, and its use must be traced to some special principle involved which adapts hydraulic apparatus to the performance of certain duties. This principle will be found to consist in storing up power in such a manner that it may be used with great force at intervals; and secondly, in the facilities afforded for multiplying force by such simple mechanism as pumps. An engine of ten-horse-power, connected with machinery by hydraulic apparatus, may provide for a force equal to one hundred horse-power for one-tenth part of the time, the power being stored up by accumulators in the interval; or in other words, the motive power acting continuously can be accumulated and applied at intervals as it may be required for raising weights, operating punches, compressive forging, or other work of an intermittent character. Hydraulic machinery employed for such purposes is more simple and inexpensive than gearing and shafts, especially in the application of a great force acting for a considerable distance, and where a cylinder and piston represent a degree of strength which could not be attained with twice the amount of detail, if gearing, screws, levers, or other devices were employed instead.

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THREE: If happiness consists in the appropriate exercise of our vital functions, then the highest happiness must result from the highest activity, whether we choose to call that reason or anything else which is the ruling and guiding principle within us, and through which we form our conceptions of what is noble and divine; and whether this be intrinsically divine, or only the divinest thing in us, its appropriate activity must be perfect happiness. Now this, which we call the theoretic activity, must be the mightiest; for reason is supreme in our souls and supreme over the objects which it cognises; and it is also the most continuous, for of all activities theorising is that which can be most uninterruptedly carried on. Again, we think that some pleasure ought to be mingled with happiness; if so, of all our proper activities philosophy is confessedly the most pleasurable, the enjoyments afforded by it being wonderfully pure and steady; for the existence of those who are in possession of knowledge is naturally more delightful than the existence of those who merely seek it. Of all virtues this is the most self-sufficing; for while in common with every other virtue it presupposes the indispensable conditions of life, wisdom does not, like justice and temperance and courage, need human objects for its exercise; theorising may go on in perfect solitude; for the co-operation of other men, though helpful, is not absolutely necessary to its activity. All other pursuits are exercised for some end lying outside themselves; war entirely for the sake of310 peace, and statesmanship in great part for the sake of honour and power; but theorising yields no extraneous profit great or small, and is loved for itself alone. If, then, the energising of pure reason rises above such noble careers as war and statesmanship by its independence, by its inherent delightfulness, and, so far as human frailty will permit, by its untiring vigour, this must constitute perfect human happiness; or rather such a life is more than human, and man can only partake of it through the divine principle within him; wherefore let us not listen to those who tell us that we should have no interests except what are human and mortal like ourselves; but so far as may be put on immortality, and bend all our efforts towards living up to that element of our nature which, though small in compass, is in power and preciousness supreme.192But Jove all-bounteous! who, in clouds

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THREE:"Then why did not you suggest a search there?" she asked."These banknotes were paid to your firm?" he asked.

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