Diagrams, instruments used in experiments on power source of voltaic pile by [Michael Faraday?] Plate 3, figures 1-18 showing scientific instruments, metal bars and plates, and their arrangement for experiments by Faraday on the power source in a voltaic pile. Inscribed with publication and plate details. Not signed. Watermark shows a woman inscribed in an oval, a shield bearing St George's cross by her side. Subject: Physics Published in Philosophical Transactions as part of paper titled 'Experimental researches in electricity.—Sixteenth series' by Michael Faraday. Received by the Royal Society on 23 January 1840. Read 6 February 1840. [1840]