Diagram, experimental equipment by Alexander Scott A diagram of the apparatus used in Scott's investigations into the composition of water by volume, including a calibrated glass measuring vessel connected to a manometer and a mercury trough with a gas jar inside it 'to receive measured volumes of hydrogen and oxygen'. Parts of the apparatus are labelled A-L and are described in an accompanying key. Subject: 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 'On the composition of water by volume'. 1887