| Year | 1952 |
| Date | 19-Jun |
| Volume | 106 |
| Issue | 2,665 |
| Page | 785 |
| Category | Steam |
| Part | |
| Title | The Crofton Beam Engines |
| Author | Ian Bradley |
| Notes | Cylinder lubricator on James Watt engine, among the beams, an adjustable gib key, the pumps, coupling for main pump-rod, improvements, upper valve gear of James Watt engine, controls and valve mechanism |