TWO:What was wrong?To avoid imperfection in the running spindles of lathes, or any lateral movement which might exist in the running bearings, there have been many attempts to construct lathes with still centres at both ends for the more accurate kinds of work. Such an arrangement would produce a true cylindrical rotation, but must at the same time involve mechanical complication to outweigh the object gained. It has besides been proved by practice that good fitting and good material for the bearings and spindles of lathes will insure all the accuracy which ordinary work demands.
TWO: CHAPTER XVTo complete our enumeration of the forces by which a new public opinion was being created, we must mention the slaves. Though still liable to be treated with great barbarity,211 the condition of this class was considerably ameliorated under the empire. Their lives and, in the case of women, their chastity, were protected by law; they were allowed by custom to accumulate property; they had always the hope of liberty before their eyes, for emancipations were frequent and were encouraged by the new legislation; they often lived on terms of the closest intimacy with their masters, and were sometimes educated enough to converse with them on subjects of general interest. Now a servile condition is more favourable than any other to religious ideas. It inculcates habits of unquestioning submission to authority; and by the miseries with which it is attended immensely enhances the value of consolatory beliefs, whether they take the form of faith in divine protection during this life, or of a compensation for its afflictions in the next. Moreover, a great majority of the Roman slaves came from those Eastern countries which were the native land of superstition, and thus served as missionaries of Oriental cults and creeds in the West, besides furnishing apt disciples to the teachers who came from Asia with the express object of securing converts to their religion in Rome. The part played by slaves in the diffusion of Christianity is well known; what we have to observe at present is that their influence must equally have told in favour of every other supernaturalist belief, and, to the same extent, against the rationalism of writers like Horace and Lucian.
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