Plate, figure 1 showing apparatus for testing ignition of wire in atmospheres of various gases by William Robert Grove Figure 1 showing the apparatus used by Grove to conduct experiments on the ignition of a wire in the atmospheres of various gases, and the effect that these experiment have on a voltameter. Subject: Physics Published in Philosophical Transactions as 'On the effect of surrounding media on voltaic ignition'. Received by the Royal Society on 10 August 1848. Read 14 December 1848. [1848]