FORE:Referring again to the hammer problem, it will be found by examining the history that the makers of automatic-acting steam-hammers capable of giving the dead stamp blow, have employed the principle which has been described. Instead of employing the momentum, or the gravity of moving parts, to open the valve after the hammer stops, some engineers have depended upon disengaging valve gear by the concussion and jar of the blow, so that the valve gearing, or a portion of it, fell and opened the valve. The 'dead blow gear,' fitted to the earlier Nasmyth, or Wilson, hammers, was constructed on the latter plan, the valve spindle when disengaged being moved by a spring.In addition to its system of intermediate duties, the Stoic ethics included a code of casuistry which, to judge by some recorded specimens, allowed a very startling latitude both to the ideal sage and to the ordinary citizen. Thus, if Sextus Empiricus is to be believed, the Stoics saw nothing objectionable about the trade of a courtesan.65 Chrysippus, like Socrates and Plato, denied that there was any harm in falsehoods if they were told with a good intention. Diogenes of Seleucia thought it permissible to pass bad money,66 and to30 sell defective articles without mentioning their faults;67 he was, however, contradicted on both points by another Stoic, Antipater. Still more discreditable were the opinions of Hecato, a disciple of Panaetius. He discussed the question whether a good man need or need not feed his slaves in a time of great scarcity, with an evident leaning towards the latter alternative; and also made it a matter of deliberation whether in case part of a ships cargo had to be thrown overboard, a valuable horse or a worthless slave should be the more readily sacrificed. His answer is not given; but that the point should ever have been mooted does not say much for the rigour of his principles or for the benevolence of his disposition.68 Most outrageous of all, from the Stoic point of view, is the declaration of Chrysippus that Heracleitus and Pherecydes would have done well to give up their wisdom, had they been able by so doing to get rid of their bodily infirmities at the same time.69 That overstrained theoretical severity should be accompanied by a corresponding laxity in practice is a phenomenon of frequent occurrence; but that this laxity should be exhibited so undisguisedly in the details of the theory itself, goes beyond anything quoted against the Jesuits by Pascal, and bears witness, after a fashion, to the extraordinary sincerity of Greek thought.70
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