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  1. Comptes rendus 157, 708 and 1410 (1913).
  2. Dufour and Prunier, Comptes rendus 204, 1925 (1937).
  3. Langevin, Comptes rendus 205, 304 (1937).
  4. J. Opt. Soc. Am. 27, 263 (1937).
  5. In order to avoid any question of what happens to the clock rates or scale readings on the moving band when it changes direction at each mirror, we can substitute for the single moving band a series of bands moving without change of direction whose paths cross at M1, M2, etc. (as suggested by the arrow at M1 in the figure), at which points the clock and scale readings are transferred from one band to the other.
  6. There are of course not merely two clocks, but an infinity of clocks, when we include those which could be transported at finite speeds, and around other paths. As emphasized previously the idea of "local time" is unten-able, what we have are clock readings. Any number of clock readings at the same place are physically possible, depending on the behavior and history of the clocks used. More than one "time" at one place is a physical absurdity.

Other

Comptes rendus 157, 708 and 1410 (1913).

Dufour and Prunier, Comptes rendus 204, 1925 (1937).

Langevin, Comptes rendus 205, 304 (1937).

J. Opt. Soc. Am. 27, 263 (1937).

In order to avoid any question of what happens to the clock rates or scale readings on the moving band when it changes direction at each mirror, we can substitute for the single moving band a series of bands moving without change of direction whose paths cross at M1, M2, etc. (as suggested by the arrow at M1 in the figure), at which points the clock and scale readings are transferred from one band to the other.

There are of course not merely two clocks, but an infinity of clocks, when we include those which could be transported at finite speeds, and around other paths. As emphasized previously the idea of "local time" is unten-able, what we have are clock readings. Any number of clock readings at the same place are physically possible, depending on the behavior and history of the clocks used. More than one "time" at one place is a physical absurdity.

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