| Year | 1931 |
| Date | 14-May |
| Volume | 64 |
| Issue | 1,566 |
| Page | 459 |
| Category | Workshop Topics |
| Part | |
| Title | Practical Notes on Bar-boring in the Lathe, including a Method of Taper Boring |
| Author | Geo. Gentry |
| Notes | Boring in steps, boring a stepped hole with one cutter, finishing the taper bore, setting out of the steeped bore, using angle metal for measurement of adjustment, blade cutter for finishing taper holes |