| Year | 1953 |
| Date | 09-Apr |
| Volume | 108 |
| Issue | 2,707 |
| Page | 446 |
| Category | In the Workshop |
| Part | |
| Title | An Electric Muffle Furnace |
| Author | "Duplex" |
| Notes | The heating chamber or muffle, sectional view, front plate and supporting frame, back plate, the furnace casing, the fire door and frame, mounting the muffle |