| Year | 1939 |
| Date | 09-Feb |
| Volume | 80 |
| Issue | 1,970 |
| Page | 157 |
| Category | In The Workshop |
| Part | |
| Title | Bar-Boring a Casting |
| Author | Geo. Gentry |
| Notes | Condition of the work, marking off, method of boring and setting-up, drilling, boring with the bar, boring defined, some operation particulars, methods of gauging cutter settings, micrmetring the set of boring cutter |