| Year | 1919 |
| Date | 25-Sep |
| Volume | 41 |
| Issue | 961 |
| Page | 301 |
| Category | General |
| Part | |
| Title | The Management of Small Power Plants |
| Author | W.T.Wardale |
| Notes | Grooving. Diagram to illustrate, defects due to scale deposits bulging, diagram showing how boiler plates bulge |