The Newtonian gravitational constant: recent measurements and related studies

@article{Gillies1997TheNG,
  title={The Newtonian gravitational constant: recent measurements and related studies},
  author={George T Gillies},
  journal={Reports on Progress in Physics},
  year={1997},
  volume={60},
  pages={151 - 225}
}
Improvements in our knowledge of the absolute value of the Newtonian gravitational constant, G, have come very slowly over the years. Most other constants of nature are known (and some even predictable) to parts per billion, or parts per million at worst. However, G stands mysteriously alone, its history being that of a quantity which is extremely difficult to measure and which remains virtually isolated from the theoretical structure of the rest of physics. Several attempts aimed at changing… 

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