When it appeared in 1923, John Lord's Capital and Steam Power 1750-1800 was the first book to be based on the voluminous Boultori and Watt papers in Birmingham since the hey-day of Samuel Smiles. Although Lord's conclusions have been modified and corrected on various points, this book still remains the best short account of the significance of this classic engineering partnership which bulks so large in the history of technology and of...