| Year | 1999 |
| Date | 12-Mar |
| Volume | 182 |
| Issue | 4,089 |
| Page | 334 |
| Category | Stationary Engine |
| Part | 3 |
| Title | Experiments With Valve Gears |
| Author | David Bull |
| Notes | Calculations for perfect valve events. Main valve for use with expansion valve, events with slide valve as detailed on drawing, basis of sliding plate valve, conclusions drawn from the above |