| Year | 1925 |
| Date | 10-Sep |
| Volume | 53 |
| Issue | 1,272 |
| Page | 327 |
| Category | Industrial Electrics |
| Part | 2 |
| Title | The Possibilities of Electrical Switching |
| Author | J.C.H. |
| Notes | Single-way electric switch mechanism, two-way and two-way off types, application of all-or-part-and-off switch, symmetrical lighting, connections in relation to switch knob positions |