Diagrams, experimental equipment and results by Thomas Andrews Three diagrams, labelled figure 1 and diagrams 1-2. Figure 1 shows a block of ice in a sheet iron vessel with an 18.5lb weight on top of it. Diagrams 1-2 are curves titled 'Penetration of steel rod into pure ice, in inches' and 'Penetration of steel rod into pond ice, in inches' respectively. Subject: Physics / Chemistry Prints of these diagrams were published in volume 48 of the Proceedings of the Royal Society alongside the paper 'Observations on pure ice.—Part II'. 1890