| Year | 1930 |
| Date | 17-Apr |
| Volume | 62 |
| Issue | 1,510 |
| Page | 369 |
| Category | Electrical |
| Part | |
| Title | Modern Electrical Installation Work |
| Author | Frederick H.Taylor |
| Notes | "Whole or part" and "series-parallel" switches, restrictive circuit switching, position use and wiring-up of lamp switches, fixing height for switches, rating of switches |