Figures, experimental apparatus and results by J B [James Ballantyne] Hannay A pencil drawing, labelled figure 1, showing a large block of wood with a groove cut in it. A tube with two upright arms runs horizontally through the groove. One end of the tube is connected to a vessel. This is followed by three graphs of experimental results. Subject: Chemistry / Scientific apparatus and instruments Received 22 February 1881. Read 10 March 1881 / January 26 1882. Communicated by George Gabriel Stokes. Prints of the figure and graphs were published in volume 33 of the Proceedings of the Royal Society alongside the paper 'On the limit of the liquid state'. 1881