Ce livre est une étude des inventions qui ont été présentées 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 également des descriptions détaillées de chaque invention et des images illustratives. L'auteur, Jean Baptiste Ambroise Marcellin Jobard, était un journaliste français qui a écrit sur l'industrie et les innovations tout au long de sa vie. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.