THREE:Consistency is, indeed, the one word which, better than any other, expresses the whole character of Socrates, and the whole of philosophy as well. Here the supreme conception153 of mind reappears under its most rigorous, but, at the same time, its most beneficent aspect. It is the temperance which no allurement can surprise; the fortitude which no terror can break through; the justice which eliminates all personal considerations, egoistic and altruistic alike; the truthfulness which, with exactest harmony, fits words to meanings, meanings to thoughts, and thoughts to things; the logic which will tolerate no self-contradiction; the conviction which seeks for no acceptance unwon by reason; the liberalism which works through free agencies for freedom; the love which wills anothers good for that others sake alone.98 It was the intellectual passion for consistency which made Socrates so great and which fused his life into a flawless whole; but it was an unconscious motive power, and therefore he attributed to mere knowledge what knowledge alone could not supply. A clear perception of right cannot by itself secure the obedience of our will. High principles are not of any value, except to those in whom a discrepancy between practice and profession produces the sharpest anguish of which their nature is capable; a feeling like, though immeasurably stronger than, that which women of exquisite sensibility experience when they see a candle set crooked or a table-cover awry. How moral laws have come to be established, and why they prescribe or prohibit certain classes of actions, are questions which still divide the schools, though with an increasing consensus of authority on the utilitarian side: their ultimate sanctionthat which, whatever they are, makes obedience to them truly moralcan hardly be sought elsewhere than in the same consciousness of logical stringency that determines, or should determine, our abstract beliefs.Different kinds of gearing can be seen in almost every engineering establishment, and in view of the amount of scientific information available, it will only be necessary to point out some of the conditions that govern the use and operation of the different kinds of wheels. The durability of gearing, aside from breaking, is dependent upon pressure and the amount of rubbing action that takes place between the teeth when in contact. Spur wheels, or bevel wheels, when the pitch is accurate and the teeth of the proper form, if kept clean and lubricated, wear but little, because the contact between the teeth is that of rolling instead of sliding. In many cases, one wheel of a pair is filled with wooden cogs; in this arrangement there are four objects, to avoid noise, to attain a degree of elasticity in the teeth, to retain lubricants by absorption in the wood, and to secure by wear a better configuration of the teeth than is usually attained in casting, or even in cutting teeth.