| Year | 1939 |
| Date | 21-Dec |
| Volume | 81 |
| Issue | 2,015 |
| Page | 683 |
| Category | General |
| Part | |
| Title | Hydraulic Extrusion Pipe Press |
| Author | E.L.Michell |
| Notes | An experimental working model. Rear and front views, overall view showing arrangement at top of crosshead, inspecting the valves, close-up of top of press (photos by H.Reardon |