| Year | 1919 |
| Date | 29-May |
| Volume | 40 |
| Issue | 944 |
| Page | 426 |
| Category | General |
| Part | 3 |
| Title | The Principles of Typewriter Mechanism |
| Author | Nathan Sharpe |
| Notes | The Bilck. Type wheels, snail, under view of machine head, rear view of instrument, machine head & half of the keys removed to show frames, key lwevers, sketch of typewheel, medial cross sectional elevation, partly diagrammatic |