Plate, draft of figure 44 showing sheet copper cradle by [William Thomson] Early draft of figure 44, incorporated within text, showing a diagram of a cradle made of a bent piece of sheet copper. For later draft see PT/55/1/10. 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]