For Joseph Beuys, drawings were a way to work out ideas in their early stages. He described them as 'reservoirs' from which he could take source material and return to many times. The look of the drawing was not of central important to Beuys, as it was primarily designed to capture and represent his ideas. In this drawing, a page of calculation forms the backdrop for a male figure, drawn in iron chloride, who adds a human presence. The words on the ink stamp can be translated literally as 'Main Stream' or 'Power line', but the stamp is a later addition to the work.