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formal operations

Overview page. Subjects: Psychology.

In the theory of cognitive development of the Swiss psychologist Jean Piaget (1896–1980), the developmental stage beginning at about 12 years when children become proficient in manipulating...

See overview in Oxford Index

Hazard, Thomas Robinson

Gail Fowler Mohanty.

in American National Biography Online

January 1999; p ublished online February 2000 .

Reference Entry. Subjects: Social and Cultural History; Society and Culture; Manufacturing; History of Manufacturing and Construction; Education. 1460 words.

Hazard, Thomas Robinson (03 January 1797–26 March 1886), manufacturer and reformer, was born in South Kingstown, Rhode Island, the son of Rowland Hazard, a manufacturer and merchant, and...