| Year | 1923 |
| Date | 01-Nov |
| Volume | 49 |
| Issue | 1,175 |
| Page | 498 |
| Category | Workshop |
| Part | |
| Title | Drilling Holes on Combined Angles |
| Author | J.R.N. |
| Notes | Cube drilled on the apparent angles, method of determining required angle for drilling hole, cube incorrectly and correctly placed on bevel, drill clearance from larger hole |