| Year | 1933 |
| Date | 05-Oct |
| Volume | 69 |
| Issue | 1,691 |
| Page | 334 |
| Category | Workshop Topics |
| Part | |
| Title | An Old Method of Boring Cylinders |
| Author | Geo. Gentry |
| Notes | Section of a vertical cylinder boring mill of 1802, historic points in the apparatus, the machine described |