| Year | 1933 |
| Date | 30-Nov |
| Volume | 69 |
| Issue | 1,699 |
| Page | 515 |
| Category | General |
| Part | |
| Title | Speedometers and Tachometers |
| Author | Alfred W.Marshall |
| Notes | Inexpensive Instruments for Use with Pedal-driven Cycles, Small Engines and other Machines. Testing B.Y.C. speedometer, the question of accuracy, component parts of B.Y.C., speedometer and myself, using a speedometer, some general observations, reminiscence and philosophy, testing B.T. and LE "E.D." ALL speedometers, conversion of speedometer to tachometer |