THREE:Shop system may also be classed as a branch of engineering work; it relates to the classification of machines and their parts by symbols and numbers, to records of weight, the expense of cast, forged, and finished parts, and apportions the cost of finished machinery among the different departments. Shop system also includes the maintenance of standard dimensions, the classification and cost of labour, with other matters that partake both of a mechanical and a commercial nature.The most important result of the old Pythagorean teaching was, that it contributed a large elementsomewhat too large, indeed,to Platos philosophy. Neo-Pythagoreanism bears precisely the same relation to that revived Platonism which was the last outcome of ancient thought. It will be remembered that the great controversy between Stoicism and Scepticism, which for centuries divided the schools of Athens, and was passed on by them to Cicero and his contemporaries, seemed tending towards a reconciliation based on a return to the founder of the Academy, when, from whatever cause, Greek speculation came to a halt, which continued until the last third of the first century after Christ. At that epoch, we find a great revival of philosophical interest, and this revival seems to have been maintained for at least a hundred years, that is to say, through the whole of what is called the age of the Antonines. In the struggle for existence among the rival sects which ensued, Platonism started with all the advantages that a great inheritance and a great name could bestow. At the commencement of this period, we find the Academy once more professing to hold the doctrines of its founder in their original purity and completeness. Evidently the sober common-sense view of Antiochus had been discarded, and Platos own writings were taken as an authoritative standard of truth. A series of industrious commentators undertook the task of elucidating their contents. Nor was it only in the schools that their influence was felt. The beauty of their style must have strongly recommended the Dialogues to the attention of literary men. Plutarch, the most considerable Greek writer of his time, was a declared Platonist. So251 also was the brilliant African novelist, Apuleius, who flourished under Marcus Aurelius. Celsus, the celebrated anti-Christian controversialist, and Maximus, the Tyrian rhetorician, professed the same allegiance; and the illustrious physiologist Galen shows traces of Platonic influence. Platonism, as first constituted, had been an eminently religious philosophy, and its natural tendencies were still further strengthened at the period of its revival by the great religious reaction which we have been studying in the present chapter; while, conversely, in the struggle for supremacy among rival systems, its affinities with the spirit of the age gave it an immense advantage over the sceptical and materialistic philosophies, which brought it into still closer sympathy with the currents of popular opinion. And its partisans were drawn even further in the same direction by the influence of Neo-Pythagoreanism, representing, as this did, one among the three or four leading principles which Plato had attempted to combine.