| Year | 1916 |
| Date | 14-Sep |
| Volume | 35 |
| Issue | 803 |
| Page | 170 |
| Category | Electrical |
| Part | |
| Title | The Principles of Modern Printing Telegraphy |
| Author | H.H.Harrison |
| Notes | Chain relay step-by-step printing telegraph (Morkrum), (Harrison), illustrating complete overlap of setting & printing cycles (Kirk Himrod) |