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Од мермер.
ќе морам да се сложам со ривалот...значи, неам поим
е сега, може ќе биде малку offtopic, ама еве кој знае:
How Marbles are Made.
Stone marbles were manufactured in immense quantities fit Saxony for exportation to the United States, India, and China. The common marble is manufactured of hard stone quarried near Coburg, Saxony, and the process is practically the same as that used by nature in grinding out the little round pebbles originally used by the children of long ago.
Nature, though constantly busy, is slow. We do not want to wait a thousand or maybe a million years for her to get our marbles ready. Our fingers might be too old to shoot with them, so we adopt nature's principles, but make more haste. In place of frost man uses a hammer to break the stone into fragments.
The hammer breaks the bard stone into small squares, or, more properly, cubical shaped blocks. These are placed a large millstone one hundred or two hundred at a time. The millstone has several grooves cut in it in the form of rings, one ring inside another, or, as your Geometry would put it, in the form of concentric circles. Over this a block of oak of the same size as the lower stone rests on the small square fragments and is kept turning while water flows upon the bottom stone.
Power is supplied by a water-wheel, and when the machinery is set in motion the little cubes are compelled, by the pressure and motion of the upper piece, to roll over and over in their circular tracks, and round and round and round they travel like circus hones in a ring. In fifteen minutes' time the mill does what nature takes years to accomplish, and the little blocks of stone are turned into small stone balls. These are the unfinished marbles and need something.
One such mill can turn out two thousand marbles a week, and if there are four or five sets of millstones running, eight thousand or ten thousand a week can be manufactured. In another part of the establishment the waterwheel turns a number of wooden barrel-shaped receptacles, something like the copper ones used for making candy in this country. Inside the wooden casks are hard stone cylinders. These revolving cylinders smooth the marbles, which are compelled by the motion of the machinery to keep up a constant rubbing against each other and against the stone cylinder. When they are smooth enough the dust made by the last process is emptied from the casks and fine emery powder substituted. This gives finish and polish to the marble.
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