CHAPTER V. COALBROOKDALE IRON WORKS--THE DARBYS AND REYNOLDSES. Failure in the attempts to smelt iron with pit-coal Dr.Blewstone's experiment Decay of the iron manufacture Abraham Darby His manufacture of cast-iron pots at Bristol Removes to Coalbrookdale His method of smelting iron Increased use of coke Use of pit-coal by Richard Ford Richard Reynolds joins the Coalbrookdale firm Invention of the Craneges in iron-refining Letter of Richard Reynolds on the subject Invention of cast-iron rails by Reynolds Abraham Darby the Second constructs the first iron bridge Extension of the Coalbrookdale Works William Reynolds: his invention of inclined planes for working canals Retirement of Richard Reynolds from the firm His later years, character, and death.