category:Simulation operation


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    "And Aulus the Dictator


    1.We know well enough how great stones--pillars and obelisks--are brought into place by means of our modern appliances. But if the great blocks were raised by a mob of naked Picts, or any tribe that knew none of the mechanical powers but the lever, how did they set them up and lay the cross-stones, the imposts, upon the uprights? It is pleasant, once in a while, to think how we should have managed any such matters as this if left to our natural resources. We are all interested in the make-shifts of Robinson Crusoe. Now the rudest tribes make cords of some kind, and the earliest, or almost the earliest, of artificial structures is an earth-mound. If a hundred, or hundreds, of men could drag the huge stones many leagues, as they must have done to bring them to their destined place, they could have drawn each of them up a long slanting mound ending in a sharp declivity, with a hole for the foot of the stone at its base. If the stone were now tipped over, it would slide into its place, and could be easily raised from its slanting position to the perpendicular. Then filling in the space between the mound and two contiguous stones, the impost could be dragged up to its position. I found a pleasure in working at this simple mechanical problem, as a change from the more imaginative thoughts suggested by the mysterious monuments.
    3.Leaving London at twenty minutes before ten in the forenoon, we arrived in Paris at six in the afternoon. I could not say that the region of France through which we passed was peculiarly attractive. I saw no fine trees, no pretty cottages, like those so common in England. There was little which an artist would be tempted to sketch, or a traveller by the railroad would be likely to remember.
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