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A new determination of the constant of gravitation by means of the torsion balance has been made in the hope of improving the precision of the result published in 1930. A number of suggested improvements in the apparatus were tried, and two of these were adopted The result obtained shows so slight an improvement over the 1930 result that it appears that the limiting point of diminishing returns has been reached with this form of apparatus.
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Heyl et al. (1942) studied this question.
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