| Year | 2003 |
| Date | 17-Oct |
| Volume | 191 |
| Issue | 4,206 |
| Page | 432 |
| Category | Hot Air |
| Part | 1 |
| Title | 'Hopkins' Hot Air Engines |
| Author | James G.Rizzo (Malta) |
| Notes | An unusual design from 1887. Introduction. Engine layout, visual appearance of both engines. The Hopkins Mk. 1. Description of engine, engine construction, cylinder block |