In physics, sound is a vibration that typically propagates as an audible wave of pressure, through a transmission medium such as a gas, liquid or solid.
They say gravity is the centre of attraction ; I rather think that noise is. Nothing so soon assembles the inhabitants of a house as a loud and sudden noise:
Letitia Elizabeth Landon, The Book of Beauty, 1833 (1832), 'The Talisman'.
Production for sale in a market in which the object is to realize the maximum profit is the essential feature of a capitalist world-economy. In such a system production is constantly expanded as long as further production is profitable, and men constantly innovate new ways of producing things that will expand the profit margin.
Immanuel Wallerstein (1979) The Capitalist World-Economy. p. 15.
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