| Year | 1918 |
| Date | 03-Jan |
| Volume | 38 |
| Issue | 871 |
| Page | 13 |
| Category | Practical Letters from Our Readers |
| Part | |
| Title | Horizontal Water Wheel: Advice Required |
| Author | R.D.C. |
| Notes | Plan of water wheel, a water-driven centrifuge, section of existing machine, alternative suggestions for vanes of wheel, for shape of casing |