Anita Ganeri Books
The story of weights and measures
By Anita Ganeri
Describes the development of various systems of measurement, from early methods using parts of the body, to maps and map scales, gravity, light years, and modern balances and scales.
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By Anita Ganeri
Surveys the history of communication throughout the ages, including signs and symbols, letter writing, the telegraph, the telephone, radio, television, and computers.
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