Diagrams, a new magnetometer by W Stroud Two diagrams, labelled figures 1-2, showing a schematic of Stroud's magnetometer and a magnetic hook to be attached to the instrument respectively. Includes a note to the engraver. Subject: Magnetism / Scientific apparatus and instruments Prints of these diagrams were published in volume 48 of the Proceedings of the Royal Society alongside the paper 'Preliminary note on a new magnetometer'. 1890