| Year | 1926 |
| Date | 02-Sep |
| Volume | 55 |
| Issue | 1,321 |
| Page | 228 |
| Category | Domestic Engineering |
| Part | |
| Title | Practical Private telephone Installations at Small Cost |
| Author | B.Clements Henry |
| Notes | Plug gear, making twin plugs and sockets, cement insulation, materials, another pattern, rectangular single stem plug, jack plug and jacks, uses of jack plugs |