| Year | 1931 |
| Date | 07-May |
| Volume | 64 |
| Issue | 1,565 |
| Page | 435 |
| Category | Workshop Topics |
| Part | |
| Title | Practical Notes on Bar-boring in the Lathe, including a Method of Taper Boring |
| Author | Geo. Gentry |
| Notes | General note, boring, some advantages of bar-boring, the job to be described, the boring bar |