Drawing of torsion balance apparatus used by Henry Cavendish in the 'Cavendish Experiment' to measure the gravitational constant in 1798.  This is a vertical section through the apparatus, including the building that housed it.  Copy of Figure 1 from his 1798 paper 'Experiments to determine the Density of the Earth' published in <i>Philosophical Transactions of the Royal Society of London</i>, (part II) <b>88</b> p.469-526 (21 June 1798). Alterations: removed frame and caption, compensated for shear distortion caused by scanning book, converted to PNG.
Henry Cavendish
1798-06-21
<a rel="nofollow" class="external text" href="https://books.google.com/books?id=zrkEAAAAMAAJ&amp;pg=PA62">Cavendish,H.(1798), 'Experiments to determine the Density of the Earth' in McKenzie, A.S. ed. <i>Scientific Memoirs Vol.9: The Laws of Gravitation</i>, American Book Co. 1900, p.62</a> on Google Books.