Above is a painting by John Constable, provided by our friends at artrenewal.org. This painting is constructed using the powerspots. Here is where they fall on this image.
I have drawn a red line joining the two powerspots on the right. The weight of the tree is poised on that line. The boys head on the tow horse, falls on the right, lower powerspot. This is not an accident, Constable designed it this way. The two elements balance one another, The boy on that horse is able to balance an entire tree because he is a figure and that is arresting of our attention, by the way. It is possible to balance a large shape with a very interesting small one.
Here is Thomas Coles The Course of Empire, Desolation. Its pretty easy to spot this one. Below is another example, Duel after a Ball, by Leon Gerome.
Here the lower left powerspot is the location of the action. OK enough of the powerspot posts. Tomorrow I will march onwards.