Nicola also inquired about the terminology, and Dupuit's 1844 article cited by Manuela seems to make no reference to "deadweight loss" (or similar). In 1844 Dupuit was clearly working with the general notion and showed it as a triangle ("and the loss of utility becomes the triangle RTN;" see the 1996 reprint in The Foundations of Public Finance, Vol. II, E. Elgar). His many references to the concept were translated as "loss of utility," "loss to society," and "loss of utility to society." The translation of Dupuit (1849), meanwhile, contains "dead loss," as in "dead loss for everybody" (p. 8 of the 1998 reprint in The Foundations of Regulatory Economics, Vol. I., E. Elgar). Torsten Schmidt