| Year | 1935 |
| Date | 03-Oct |
| Volume | 73 |
| Issue | 1,795 |
| Page | 335 |
| Category | Model Marine Notes |
| Part | 3 |
| Title | Suggestions for Improving Flash Steam Plants. Valve gears for High Efficiency Engines |
| Author | Edgar T.Westbury |
| Notes | The Pomeroy single cylinder engine, rotary valves, single vertical piston valve serving two single-acting cylinders, part sectional elevation and plan of the rotary valve engine of H.H.Groves' "Irene III", plan of rotary disc valve driven by skew gear |