Goldthwait's map of the United States & Canada : exhibiting the railroads with their distances, single and double tracks and width of gauge, and the time compared with noon at Washington & Greenwich / by J.H. Goldthwait.Goldthwait, J. H1861Includes statistical charts: Population of the United States (by state and territory, 1790-1860) -- Ratio of slaves to total population -- Positions of forts.Insets: Map of the great railroad routes frPrime meridian: Greenwich.Relief shown by hachures.cartographic