I wrote: Consider, then, the following scenario: > > [- +] [- +] [- +] > [- G1 +] [- G2 +] [- G3 +] > [- +] [- +] [- +] > > > Here G1, G2 and G3 refer to grains of tungsten in the wire, and the > electrons flow from left to right. >
(In labelling the diagram, I was absentmindedly thinking in terms of charge density, not electrical diagrams. In terms of an electrical diagram, the electrons would in fact flow from right to left.)
