| Year | 1961 |
| Date | 04-May |
| Volume | 124 |
| Issue | 3,121 |
| Page | 549 |
| Category | Historic |
| Part | |
| Title | Watt was proud of his Parallel Motion |
| Author | Ian Bradley |
| Notes | Sun-and-Planet gear, rotative atmospheric engine (Farey), harnessing the beam, Littlemore Pumping Station Oxford, double acting, the motion in use |