| Year | 1931 |
| Date | 21-May |
| Volume | 64 |
| Issue | 1,567 |
| Page | 502 |
| Category | Queries and Replies |
| Part | |
| Title | 4200. Charging Wireless and Car Accumulators |
| Author | E.H.H. |
| Notes | Diagram showing arrangement of lay-out for charging plant for dealing with wireless and car accumulators |