| Year | 1925 |
| Date | 31-Dec |
| Volume | 53 |
| Issue | 1,288 |
| Page | 839 |
| Category | Domestic Engineering |
| Part | 2 |
| Title | Practical Private Telephone Installations at Low Cost |
| Author | B.Clements Henry |
| Notes | Installation Systems. Examples of parallel connections, central as "master station", central calling both ways, push with hook-switch for "one-way-call", two- and three- terminal receiving blocks, four-way push panel |