| Year | 1916 |
| Date | 01-Jun |
| Volume | 34 |
| Issue | 788 |
| Page | 370 |
| Category | Electrical |
| Part | 1 |
| Title | The Principles of Modern Printing Telegraphy |
| Author | H.H.Harrison |
| Notes | Modern keyboard perforator, methods of selecting & actuating perforator punches, back-spacing device, Murray's automatic "stop & start device |