| Year | 1915 |
| Date | 02-Sep |
| Volume | 33 |
| Issue | 749 |
| Page | 204 |
| Category | Workshop Topics |
| Part | |
| Title | Marking Off a Drilling Jig |
| Author | |
| Notes | Top view of jig, setting up for marking-off one centre of boss, underside view of jig showing swivel fitted, diagram explaining the action of a grinding jig, front view of jig with drill in position |