Reports of the United States Commissioners to the Paris Universal Exposition, 1867: Examination of the telegraphic apparatus and the process in telegraphy. By S. F. B. Morse. Steam engineering as illustrated by the Paris universal exposition. By W. S. Auchincloss. Civil engineering and public works. By W. P. Blake. Béton-coignet; its fabrication, and uses. By L. F. Beckwith. Asphalt and bitumen as applied in construction. By Arthur Beckwith. Buildings, building materials, and methods of building. By J. H. Bowen. Mining and the mechanical preparation of ores. By H. F. Q. D'Aligny, and Messrs. Heut, Geyler, and Lepainteur