| The scout from the rear now came in with a leap | [Frontispiece] |
| | PAGE |
| 'Stop!' cried John, 'It will be death for any one to touch him' | [59] |
| 'It is copper,' said John | [138] |
| The old man pointed to the rocky wall | [154] |
| | |
| Fig. 1. The Marimba. | [36] |
| Fig. 2. The Atlantean Plateau. | [42] |
| Fig. 3. The Severed Hemispheres. | [45] |
| Fig. 4. Silencer: Convolute Blades. | [54] |
| Fig. 5. Spitting the Roast. | [75] |
| Fig. 6. Arialad Fruit. Sarsaparilla. | [76] |
| Fig. 7. The Mistletoe. | [90] |
| Fig. 8. The Jacchus. | [95] |
| Fig. 9. The Cave on Rescue Island. | [119] |
| Fig. 10. Cinnamon. | [129] |
| Fig. 11. Phonograph Disk. | [146] |
| Fig. 12. Types of Masonry. | [154] |
| Fig. 13. Types of Safety Lamps. | [159] |
| Fig. 14. How John made the Lamp. | [160] |