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.
Most types of liquor known today were developed between the 12th and 19th centuries. Modern glass packaging and brand names began to emerge around the middle of the 19th century.The origin of liquor and its close relative liquid was the Latin verb liquere, meaning to be fluid..