| Year | 1936 |
| Date | 04-Jun |
| Volume | 74 |
| Issue | 1,830 |
| Page | 538 |
| Category | Lessons in Model Machine Shop Practice |
| Part | 5 |
| Title | Special Cylinder Head for "Grayson" 30 c.c. Petrol Engine |
| Author | |
| Notes | E.Gray and Son, special head for "Grayson" 30 cc. petrol engine, casting clamped to angle plate for marking out, boring valve seatings, special recessing cutter for forming valve guide extensions, boring sparking plug hole |