| Year | 1931 |
| Date | 21-May |
| Volume | 64 |
| Issue | 1,567 |
| Page | 497 |
| Category | Steam |
| Part | |
| Title | A Junior's Model Steam Power Plant |
| Author | David Williams |
| Notes | The boiler, the engines, high speed engine and pump, mill engine and boiler showing water tubes, author's notebook sectional sketch showing arrangement of his boiler tubes |