Diagrams, geometrical diagrams by C V [Charles Vernon] Boys Two pages of geometrical diagrams, labelled figures 1-5. The figures relate to Boys' plans for an instrument that could measure the force of gravity between masses as part of the Cavendish experiment, with a focus on a beam upon which two attracting masses or suspended balls would sit. Subject: Physics / Scientific apparatus and instruments Prints of these diagrams were published in volume 46 of the Proceedings of the Royal Society alongside the paper 'On the Cavendish experiment'. 1889