Steel making, 1555.
© Science Museum / Science & Society Picture Library
Plate taken from 'De Re Metallica' (1555) by Georgius Agricola (1494-1555). Agricola was a German mineralogist and metallurgist. He was Germany's first systematic mineralogist, and his 'De Re Metallica' (1555, translated by President Herbert Hoover (1874-1964) in 1912), is a valuable and detailed record of 16th century mining, ore-smelting and metal working.