Diagram, experimental equipment by C R [Charles Romley] Alder Wright and C Thompson A diagram of a U-shaped pipe with a funnel at one end and a rubber bung at the other. A piece of glass tubing with a platinum wire is passed through the bung and attaches to a copper plate inside the pipe. An aeration plate in the funnel is supported by a disc of porous earthenware. Parts of the diagram are labelled a-f and described in the accompanying paper. Subject: Chemistry / Physics / Scientific apparatus and instruments A print of this diagram was published in volume 42 of the Proceedings of the Royal Society alongside the paper 'Note on the development of voltaic electricity by atmospheric oxidation'. 1887