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.
This timeline accompanies Introduction to Pop - The History of Soft Drinks. Soft drinks by definition are carbonated drinks that are non-alcoholic. Carbonated soft drinks are also refereed to as soda, soda pop, pop, or tonic. 1798 The term soda water first coined. 1810 First U.S. patent issued for the manufacture of imitation mineral waters. 1819 The soda fountain patented by Samuel Fahnestock.