| Year | 1928 |
| Date | 27-Dec |
| Volume | 59 |
| Issue | 1,442 |
| Page | 609 |
| Category | Workshop Topics |
| Part | |
| Title | Model Compound Steam Engine Construction. Some Details of Methods and Processes Used in Making the Components |
| Author | |
| Notes | General notes on relief valves, the design of relief valves used, some points in making the valves |