Examlex
The variable number of children is at the nominal level of measurement
Technological Development
The process of research, innovation, and the implementation of new technologies and processes to increase efficiency, productivity, and quality of goods and services.
Mechanical Reaper
An agricultural machine invented in the 19th century to harvest crops more efficiently, significantly increasing farming productivity.
Cyrus McCormick
An American inventor and entrepreneur best known for developing and commercializing the McCormick reaper, a key invention in the mechanization of agriculture.
Eli Whitney
An American inventor best known for inventing the cotton gin, a device that revolutionized the cotton industry by greatly facilitating the removal of seeds from cotton fibers.
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