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Socyberty > Tags > Metal
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Metal |
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 | | Cannon and Artillery Foundries Industry in Middle Ages | | by balisunset, Sep 9, 2008 | | While barrels for small artillery pieces were easily cast as early as the 13th century, most larger cannon and the great bombards were constructed by the hoop-and-stave method. It was not until improved casting techniques and mature foundries were developed that large barrels could be made as single pieces of cast metal, first in iron and bronze, and later still in brass. | | Comments(0) Liked It: 0 |
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 | | System of Coinage | | by Swapna P, Aug 21, 2008 | | Coins are a form of money. The right to make and issue coins is a state monopoly. The great majority of these coins are tokens in that their face value is greater than that of the metal of which they consist. The study of coins is known as numismatics. | | Comments(0) Liked It: 0 |
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