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.
1 1881 The first cola-flavored beverage introduced. 2  1885 Charles Aderton invented 3  . Dr Pepper  in Waco, Texas. 4  1886 Dr. John S. Pemberton invented  Coca-Cola  in Atlanta, Georgia. 5  1892 William Painter invented the crown bottle cap.