| Year | 1994 |
| Date | 16-Sep |
| Volume | 173 |
| Issue | 3,977 |
| Page | 372 |
| Category | Greenhorns' Guides |
| Part | 2 |
| Title | Grinding wheel Know-How |
| Author | Harold Mason |
| Notes | Types of wheel, Robert Tunstall, Churchill grinding machine, A. & R.T. Engineering's cylindrical grinding work, Her Majesty's Stationary Office, Government Bookshop: acknowledgements |