| Year | 1921 |
| Date | 07-Jul |
| Volume | 45 |
| Issue | 1,054 |
| Page | 14 |
| Category | Workshop |
| Part | |
| Title | Considerations of Small Piston Construction |
| Author | J.Booth |
| Notes | Position of crankpin at maximum velocity of piston, detail of piston & ring, steel & cast-iron piston, mandrel for turning |