| Year | 1919 |
| Date | 18-Dec |
| Volume | 41 |
| Issue | 973 |
| Page | 559 |
| Category | Steam |
| Part | |
| Title | A Rotary Piston Steam Motor |
| Author | G.T.G. |
| Notes | Introductory, theory of operation, action, constructional considerations, alternative piston designs, design of simple motor, two designs, design for a "shaft valve" motor |