A new property of 2-dimensional fields

THE GRAPHICAL MAPPING of a 2-dimensional field in a nearly closed area that is without sources is, at best, a difficult task. A typical case is that of flux down a slot. The only feasible approach is to map it by partial subdivision. This has been started in Figure 1 and continued in Figure 2. In this field, which will be called the original field, A′P is an equipotential boundary; AA′, BB′, and so forth, are flux lines, and the line A″P is a flux line.