Good and evil, right and wrong, become infinitesimal, ephemeral matters.
Let us conceive the zone in question to be divided into infinitesimal rings of equal area.
With this definition of temperature 0, if the heat H is measured in work units, the expression of Carnot's principle for an infinitesimal cycle of range do reduces to the simple form dW/d9=H/0.
In the notation of the integral calculus, this area is equal to f x o udx; but the notation is inconvenient, since it implies a division into infinitesimal elements, which is not essential to the idea of an area.
Discussions of the approximate calculation of definite integrals will be found in works on the infinitesimal calculus; see e.g.