Reports of the United States Commissioners to the Paris Universal Exposition, 1878: Chemical processes, T. E. Jenkins. Mining industries, J. D. Hague. Steam and gas engines, A. J. Sweeney. Machines and machine tools, W. T. Porter. Clocks and watches, E. H. Knight. Railway apparatus, W. A. Anderson
by United States. Commissioners to the Paris Universal Exposition, 1878