📗 Excerpt from Annales des Travaux Publics de Belgique, 1856-1857, Vol. 15: Documents Scientifiques, Industriels ou Administratifs, Concernant l'Art des Constructions, les Voies de Communication Et l'Industrie MinéraleLes roues du ventilateur de la mine d Aiseau, ont 74 de diamètre et 40 de largeur. Les axes de lents moyeux, qui ont 12 de rayon, sont distants de 9 mètres; les cîr conférences décrites du centre des ailes langentiellemant au bras des croix, ont un mètre de rayon.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.