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.
The Death of the Glass Bottle. December 15, 2008. Nathaniel Wyeth is probably not a name you know but Wyeth was responsible for inventing something you probably have in your home today. He worked from 1967 until he had refined and patented the process in 1973 for the now ubiquitous recyclable plastic soda bottle.