| Year | 2004 |
| Date | 11-Jun |
| Volume | 192 |
| Issue | 4,223 |
| Page | 693 |
| Category | General |
| Part | 1 |
| Title | How Harmonic is Your Motion? |
| Author | Ted Whale (Canada) |
| Notes | Analyses the motion of a piston in a reciprocating engine and explores its mathematical identity. Basics: the Scotch yoke, basics: the conrod, notes in text |