sentences:  Carnot stated that motive power is due to the fall of caloric (heat) from a hot to a cold body.The work was unnoticed until 1834 when French mining engineer Émile Clapeyron put it on a graphical footing in his "Memoir on the Motive Power of Heat".Through Clapeyron's paper, German physicist Rudolf Clausius learned of Carnot's theory of heat and through a modification of Carnot's suppositions on heat, Clausius put the second law in mathematical form with his introduction of the concept of entropy.