Plate, two movable poles and cube of wood by John Tyndall Figure 1 showing two movable poles with a cube of wood suspended between them. Subject: Physics Published in Philosophical Transactions as 'The Bakerian Lecture.— On the nature of the force by which bodies are repelled from the poles of a magnet; to which is prefixed, an account of some experiments on molecular influences'. Received by the Royal Society on 31 October 1854. Read 25 January 1855. [1854]