Ce livre est une tude des inventions qui ont t pr sent es lors d'expositions universelles. Il examine les inventions les plus populaires et les plus innovantes de chaque exposition, ainsi que l'impact qu'elles ont eu sur la vie quotidienne. Le livre contient galement des descriptions d taill es de chaque invention et des images illustratives. L'auteur, Jean Baptiste Ambroise Marcellin Jobard, tait un journaliste fran ais qui a crit sur l'industrie et les innovations tout au long de sa vie.
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