| Year | 1931 |
| Date | 03-Dec |
| Volume | 65 |
| Issue | 1,595 |
| Page | 549 |
| Category | Electrical |
| Part | 12 |
| Title | Simple Electrical Measurements |
| Author | A.H.A. |
| Notes | Diagram of induction type A.C. watt-hour meter, arrangement of gears in induction type Watt-hour meter, disc bearings and mounting |