TY - JOUR T1 - On a Determination of the Mean Density of the Earth and the Gravitation Constant by means of the Common Balance JF - Philosophical Transactions of the Royal Society of London. A (1887-1895) VL - 182 SP - 565 EP - 656 PY - 1891/01/01/ UR - http://dx.doi.org/10.1098/rsta.1891.0014 M3 - doi:10.1098/rsta.1891.0014 AU - Poynting, J. ER -