Cavendish used his method to find the value of _:

Explanation

Henry Cavendish used his method to determine the density of the Earth and, from there, to calculate the gravitational constant ( G ). He conducted the Cavendish experiment, also known as the Cavendish torsion balance experiment, in 1797-1798. The experiment involved a torsion balance, a horizontal bar suspended from a thin wire. Two small lead spheres were attached to each end of the bar, and two larger lead spheres were positioned nearby. The gravitational attraction between the small and large spheres caused the bar to twist, and by measuring this twist, Cavendish could determine the gravitational force and, subsequently, the density of the Earth. Cavendish did not directly calculate the value of ( G ), but his measurements provided the necessary data for later scientists, like C.F. Gauss, to determine the value of the gravitational constant. The modern accepted value for ( G ) is approximately 6.67430 x 10^{-11} Nm2/Kg2