| Year | 1961 |
| Date | 18-May |
| Volume | 124 |
| Issue | 3,123 |
| Page | 610 |
| Category | Historic |
| Part | |
| Title | James Watt and the Cornish Engine |
| Author | Ian Bradley |
| Notes | William Murdoch, original form of cataract, Farey's treatise, City Saw Mills, zinc works in City Road London, up the shaft, locking the valve |