| Year | 1931 |
| Date | 10-Dec |
| Volume | 65 |
| Issue | 1,596 |
| Page | 568 |
| Category | Internal Combustion |
| Part | |
| Title | Governing Petrol Motors. Two Interesting Problems |
| Author | |
| Notes | Governor with detail of control switch, plan of solenoid, detail of valve stem and cut-out, forming resistance, valve control solenoid |