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.
Vintage Libbey glass is decorative glassware made by one of Americaâs largest glass manufacturers, the Libbey Glass Company. The Libbey Glass Company was founded in 1818 in East Cambridge, MA., as the New England Glass Company. It was bought in 1878 by William L Libbey, who promptly re-branded it the New England Glass Works, Wm. L. Libbey & Sons Props. In 1888, the New England Glass Works, Wm.