| Year | 1925 |
| Date | 19-Nov |
| Volume | 53 |
| Issue | 1,282 |
| Page | 646 |
| Category | Domestic Engineering |
| Part | |
| Title | Practical Private Telephone Installations at Low Cost |
| Author | B.Clements Henry |
| Notes | Simplification, modified designs, standardisation of parts, practical details: the baseboard, the switch and key, connections at board, fitting up |