Plate, figures 10-11 showing regulator made from iron tubes and conduction apparatus by [William Thomson] Figures 10-11 showing a regulator made from iron tubes that are open at the top and closed at the bottom and a conduction apparatus used by Thomson in his experiments. 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]