2-690-930 - The Print Collector/Heritage Images

'Central Heating in Britain 1800 Years Ago', c1934. Illustration showing the Roman hypocaust system of whereby 'burning embers' from fires made by slaves were pushed through passages under the floor to heat the rooms above. From The Romance of the Nation, Volume One, edited by Charles Ray. [The Amalgamated Press, Ltd., London, c1934]