| Year | 1916 |
| Date | 21-Sep |
| Volume | 35 |
| Issue | 804 |
| Page | 177 |
| Category | General |
| Part | |
| Title | A Pendulum Harmonograph |
| Author | Thos E.B.Gunyon |
| Notes | Examples of curves produced, general arrangement, plan view from below table, details of penholder, examples of harmonic figures produced by the complete apparatus |