The first 16 figures represent the atoms of different elastic fluids, drawn in squares of different magnitude in proportion to the diameters of the atoms.
Fig. 17 exhibits curve lines by which the boiling point of liquid solutions of nitric and muraitic acid, and of ammonia, can be determined.
Dalton, John. “Plate 8: Diameters of Elastic Atoms; Ebullition of Volatile Liquids.” In A New System of Chemical Philosophy. Manchester, England: Russell & Allen, 1810. https://digital.sciencehistory.org/works/9880vr66n.