Page:BatemanTime.djvu/6

6 In order that Galileo's method of comparing times at different points of space may be suitable for a sober world, it seems necessary to suppose that a body cannot move with a velocity greater than that of light, and it may be of interest to remark that this view is supported by modern electrical theories.

Now let us suppose that a second system of observers, $$B_{1}, B_{2}, \dots B_{n}$$, find that their observations are in agreement, and so can regard themselves as a standard system. It may happen that according to their measurements the first system of observers $$A_{1}, A_{2}, \dots A_{n}$$ are in motion, and then it is easy to see that the specifications of position and time as made by the A&apos;s and the B&apos;s will not agree.