Paper, 'On the change of potential of a voltaic couple by variation of strength of its liquid' by George Gore Gore writes: 'Having found a thermo-electric pile (see ‘Birmingham Phil. Soc. Proc.,’ vol. 4, p. 130) convenient in detecting and measuring small changes of voltaic potential ('Roy. Soc. Proc.,’ May 3rd, 1888), I have taken advantage of that circumstance to measure by the method of balance the above phenomenon in various liquids.' Annotations in pencil and ink. Subject: Electricity Received 31 May 1888. Read 14 June 1888. A version of this paper was published in volume 44 of the Proceedings of the Royal Society as 'On the change of potential of a voltaic couple by variation of strength of its liquid'. 1888