| Year | 1901 |
| Date | 01-May |
| Volume | 4 |
| Issue | 48 |
| Page | 196 |
| Category | Electrical |
| Part | |
| Title | The Construction of an Inter-communicating Telephone Set |
| Author | |
| Notes | Section of bipolar receiver, section of induction coil, plam of receiver case, details of hook switch, method of mounting & connecting instruments, diagram of connections for four intercommunicating telephone stations |