Note 163 — Chapter VII · ToC

It likewise determines the quantity of plant and stock at a, b, c, d down each of the perpendicular lines, for the demand at each of these points in the production of plant and machinery is derived from the requirements at the points A, B, C, D, E. The flow of goods therefore up these channels, though slower in its movement (since in the main channel only goods flow, while fixed capital is subject to the slower "wear and tear"), is equally determined by and derived from the consumption at F. The whole motive-power of the mechanism is engendered at F, and the flow of money paid over the retail counter as it passes in a reverse current from F towards A, supplies the necessary stimulus at each point, driving the goods another stage in their journey.