These files are very large often in excess of 700k

These come from my great grandfathers' apprentice books circa 1901

California Central Railway

Ohio Connecting Railway

Oregon and Pacific Railroad

San Francisco and North Pacific Railroad

Brunel Fan Bridge

Great North of Scotland Railway Bridge

Penn Central Railroad FILE IS 3.1 Mb

Caledonian Railway FILE IS 3.1 Mb

Skew Bridge FILE IS 2.8Mb

Howe Truss Bridge

King Truss Bridge

Queen Truss Bridge