ILLUSTRATIONS
| PAGE | ||
| Justus von Liebig | [Frontispiece] | |
| Jean Baptiste André Dumas | [9] | |
| Thomas Graham | [13] | |
| From a painting by G. F. Watts, R.A., in the possession of the Royal Society | ||
| Alexander William Williamson | [15] | |
| Bunsen, Kirchhoff, and Roscoe | [19] | |
| Sir William Ramsay | [48] | |
| Marie Curie (née Sklodowska) | [56] | |
| Stanislao Cannizzaro | [65] | |
| Sir James Dewar | [98] | |
| Dmitri Ivanowitsch Mendeléeff | [110] | |
| August Kekulé von Stradonitz | [126] | |
| Jacobus Henricus Van ’t Hoff | [142] | |
| Emil Fischer | [166] | |
| Svante August Arrhenius | [180] | |