Hang on a second. The clocks int that experiment were off around ther world. There was a difference in them when compared later. Yet this difference is not being attributed to simlpe motion one way and the other. Whereas in a similar experiment (that big loop on the group, or square, with a light beam sent both ways around it), it is attributed to the simple fact of Earth's spin, or so it seems to me. It looks like they are the same effect but explained two different ways.