law of diminishing returns. A concept in economics that if one factor of production (number of workers, for example) is increased while other factors (machines and workspace, for example) are held constant, the output per unit of the variable factor will eventually diminish.
History of glass. The history of glassmaking can be traced back to 3500 BCE in Mesopotamia, but Mesopotamians may have created second-rate copies of glass objects from Egypt, where this complex craft actually originated. Other archaeological evidence suggests that the first true glass was made in coastal north Syria, Mesopotamia or Egypt.
From Wikipedia, the free encyclopedia. Conical pint glass. A pint glass is a form of drinkware made to hold either a British (imperial) pint of 20 imperial fluid ounces (568 ml) or an American pint of 16 US fluid ounces (473 ml).