| Year | 1925 |
| Date | 08-Oct |
| Volume | 53 |
| Issue | 1,276 |
| Page | 467 |
| Category | Automotive |
| Part | |
| Title | Note on Tractive Efforts for Various Road Surfaces |
| Author | S.D.S. |
| Notes | Diagrams of wheel depressing the road surface, illustrating the inter-action of wheel and road surface |