Plate, draft of figure 33 showing longitudinally magnetised iron conductor by [William Thomson] Early draft of figure 33, incorporated within text, showing an iron conductor that has become longitudinally magnetised 'through hot' after initially being transversely magnetised. A later version of this figure is found at PT/55/1/32. Subject: Physics Published in Philosophical Transactions as 'The Bakerian lecture.-On the electro-dynamic qualities of metals'. Received and read by the Royal Society on 29 February 1856. [1856]