Before revision: One example of such a device is found in the Pulvermacher chain.Lardner, p.289Pulvermacher, p .2 References BibliographyBird, Golding "Observations on induced electric currents, with a description of a magnetic contact-breaker", Philosophical Magazine, pp.18–22, no.71, vol.12, January 1838.Bird, Golding Lectures on Electricity and Galvanism, in their physiological and therapeutical relations, Wilson Ogilvy, London, 1847.Coley, N. G. "The collateral sciences in the work of Golding Bird (1814–1854)", Medical History, vol.13, iss.4, pp.
After revision: One example of such a device is found in the Pulvermacher chain.Lardner, p89Pulvermacher, p .2  Ogilvy, London, 1847.Coley, N. G. "The collateral sciences in the work of Golding Bird (1814–1854)", Medical History, vol.13, iss.4, pp.