Steel, rails, and science remade industry after 1870
After the first industrial boom cooled mid-century, another wave—telegraphs, railroads, gas and water networks, sewage systems—spread far beyond a few showcase cities. Historians label that surge the Second Industrial Revolution or Technological Revolution, strongest in Britain, Germany, and the United States.
Patrick Geddes floated the idea in Cities in Evolution (1910); David Landes later fixed scholarly usage in a 1966 essay and The Unbound Prometheus (1972). One writer dubbed 1867–1914 an "Age of Synergy" because engineering and science jointly drove innovation. Cheap steel, coal, and rail reinforced one another: low-cost transport of materials enabled more track, which burned cheap coal in locomotives, laying tens of thousands of miles of line in a self-amplifying loop.
Fuel efficiency jumped when James Beaumont Neilson patented hot blast in 1828 at Wilsontown Ironworks, preheating furnace air with flue gas. Edward Alfred Cowper's 1857 stove stored heat in firebrick instead of iron, fixing expansion cracks that ruined earlier regenerators. Lower pig-iron costs enlarged furnaces and demand. Sir Henry Bessemer's converter then oxidised impurities from molten iron with blown air, multiplying steel output while cutting labour needs for a strategic metal.
Standardised mass production and modern methods for running huge firms across wide territories accompanied the hardware. The Information Age is sometimes nicknamed a Third Industrial Revolution, underscoring how this middle phase sits between steam-age beginnings and digital industry. France, Japan, and the Low Countries joined the core three industrial powers in the same arc of discovery and factory scale-up.
Remember: concept popularised by Landes after Geddes; Neilson hot blast 1828; Cowper stove 1857; Bessemer mass steel; rails–coal–steel feedback after about 1870 that moved people and ideas as never before.
Source: Second Industrial Revolution
