| Year | 1916 |
| Date | 18-May |
| Volume | 34 |
| Issue | 786 |
| Page | 337 |
| Category | Electrical |
| Part | 1 |
| Title | The Principles of Modern Printing Telegraphy |
| Author | H.H.Harrison |
| Notes | Elementary apparatus for sending letter-signal current permutations over a sinlge wire, keyboard locking & cadence device, current parmutations by character-key levers, mechanical signal-storage, early form of perforator (Baudot), automatic transmitter controlled by signal tape & working with a rotary distributor |