| Year | 1939 |
| Date | 04-May |
| Volume | 80 |
| Issue | 1,982 |
| Page | 523 |
| Category | Locomotive |
| Part | |
| Title | Power Brakes |
| Author | Henry Greenly |
| Notes | Methods of Retarding Model Steam Locomotives. An automatic condensate release valve for steam brake cylinders, model drain-valve, a driver's steam brake control of the reducing valve type, brake cylinder for model L.N.E.R. Pacific, the action of the reducing valves, adjustable valve, valve designed by W.Barnard Hart, the control valve, the cap, control of driver's valve |