In The Progress of Railroading, how is the abstract discussed?
The Progress of Railroading is group of public artworks by American artist Louis Saint-Gaudens. This series of six sculptures were cut by Andrew E. Bernasconi, a high-grade Italian stone workman, between 1909 and 1911.  These statues are located at Union Station in Washington, D.C., United States. The sculptures represent deities and Ancient Greek thinkers related to rail transport in the United States.
American Louis Saint-Gaudens Washington, D.C. United States rail transport in the United States deities Union Station