Railroads in 1857 — the railroad network in the North is much denser than in the South — Library of Congress Geography and Map Division Washington, DC 20540–4650 USA dcu

Working with Historical Data

Slavery and Economic Disparity in the Pre-Civil War USA

Today data is readily available on the internet. Do you want to know details about the bike-sharing program in New York? Just take a look — https://www.citibikenyc.com/system-data. Do you want to know details about crime in Toronto? You are welcome — https://data.torontopolice.on.ca/pages/open-data. More and more historical data also becomes available —…