Mechanical and Civil Engineering, Division of [former name], NMAH, SI
Pennsylvania, Philadelphia and Columbia Railroad
Philadelphia and Reading Railroad
0.1 cu. ft.; 0.003 cu. meters
These papers of W. H. Wilson, civil engineer, contain photostatic copies of designs for bridges, tunnels, track work, roadwork, and timber and masonry, structures on the Pennsylvania, Philadelphia and Columbia, and Philadelphia and Reading Railroads.