| Year | 1916 |
| Date | 04-May |
| Volume | 34 |
| Issue | 784 |
| Page | 310 |
| Category | Electrical |
| Part | 1 |
| Title | The Principles of Modern Printing Telegraphy |
| Author | H.H.Harrison |
| Notes | Principle of Hughes type-printing telegraph, time signal over a single wire, inversion device for type-wheel & type-bar printing mechanism, time comparison of telegraphic codes |