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GENERAL REPORT GF THE JUDGES OF GROUP XXVI. 2 $ monograph (Notices sur les Modeles, Cartes, et Dessins, relatifs aux Travaux des Ponts et Chaussees et des Mines, reunis par les soins du Minist'ere des Travaux Publics') gave every facility and enlightenment. Commendation is due not only to the department and its chief, but notably to M. Lavoinne, the engineer intrusted with the erection of the imported building and the installation of the collective exhibit. The exhibit was especially complete in the items of roads, railways, interior navigation, maritime works, light-houses and beacons, and public water-works. It would be impossible in a brief report even to catalogue the different objects, and it is almost unfair to make invidious selections. The examples selected for this report are chosen not because they are the most conspicuously interesting, only as the most easily described in few words. Among the models was one of four piers and three arches of the railway bridge over the Aulne,—of which the parapet is about 190 feet above the foundation rock, and where, as it crosses a channel used by seagoing vessels, the system of superposed arches could not be adopted. The result is bold and elegant. The viaduct bridge at Point-du-Jour, below Paris, built for the Chemin de fer de Ceinture, was shown in three models,—1, a model of the whole structure; 2, a model of an arch of the approach; 3, a model of an arch of the bridge proper. The whole structure here represented is more than a mile in length, with a roadway and foot path, and (at a higher level) a railway. The roadway is 44 feet above the foundations of the piers, and the railway is 30 feet above this. The iron viaduct over the Bouble was shown by well-drawn plans. This noteworthy structure consists of 6 trusses, with a span of 164 feet each, carrying a railway 200 feet above the water-level, and sup ported by 5 trestle-work piers of iron, having a height of from 140 feet to 188 feet above the masonry foundations. A large sheet of drawings showed the elevations, plan, and details of the new station, in Paris, of the Orleans Railway. This station, which now extends from the Boulevard de l’Hopital to the Quai d’Austerlitz, covers about 25 acres. The architectural effect is grand and appropriate, and all of the dispositions for arriving and departing passengers and freight are excellent and well studied. The main roof, which covers eight tracks and two platforms, measures 169 feet by 918 feet. The entire work of construction, involving the removal of old work and the building of new,—involving the necessity of starting foundations at a depth of from 25 feet to 35 feet below the surface of the ground,—was carried on without interruption to traffic. In exca-