A System of Space-Time Co-ordinates

@article{SyngeASO,
  title={A System of Space-Time Co-ordinates},
  author={John Lighton Synge},
  journal={Nature},
  volume={108},
  pages={275-275}
}
THE common instruments of measurement proposed in theory and employed in practice for the co-ordination of physical events consist of rigid bars and clocks. The limitations of such methods are obvious. The erection of a rigid bar for the direct determination of the distance of the moon from the earth is inconceivable from a practical point of view, while it is a gross absurdity to speak of the measurement of molecular distances by means of rigid bodies. There is only one type of connecting-link… Expand
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