| Year | 1925 |
| Date | 22-Oct |
| Volume | 53 |
| Issue | 1,278 |
| Page | 524 |
| Category | Workshop Topics |
| Part | |
| Title | Designing Conical Objects. Funnels, Megaphones, Horns, Lamp Shades, and other Conical-Shaped Gear |
| Author | J.C.H. |
| Notes | Diagram of complete cone, illustrating the principle of setting out |