| FIG. | Illustrations of Aberration. | | 1. | Cannon shots | 35 | | 2. | Boats or Waves | 36 | | 3. | Lighthouse beams | 37 | | 4. | Ray through a moving stratum | 40 | | 5. | Wave-fronts in moving medium | 41 | | 6. | Normal reflexion in moving medium | 43 | | Experiments on Ether drift. | | 7. | Interference Kaleidoscope | 51 | | 8. | Hoek's experiment | 53 | | 9. | Experiment of Mascart and Jamin | 54 | | 10. | Diagram of Michelson's experiment | 61 | | Illustrations of Ether Machine (Lodge). | | 11. | Diagram of course of light | 69 | | 12. | General view of whirling part of Ether Machine | 72 | | 13. | General view of optical frame | 73 | | 14. | Drawing of optical details | 74 | | 15. | View of Ether Machine in action | Frontispiece | | 16. | Appearance of interference bands and micrometer wires | 76 | | 17. | Iron mass for magnetisation | 77 | | 18. | Appearance of bands | 76 | | 19. | Arrangement for electrification | 78 |
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