| Month | Subject | Author | Remark | |
| 07-01 | Azimuth sundial 1 | Fer de Vries | ||
| 07-02 | Azimuth sundial 2 | Fer de Vries | ||
| 07-03 | Azimuth sundial 3 | Fer de Vries | Cylinder | |
| 07-04 | Self-aligning sundial | Fer de Vries | ||
| 07-05 | Effect of a wide style triangle on date line shape |
Fer de Vries | ||
| 07-06 | Altitude dial 1. | Fer de Vries | Shepherds’ dial | |
| 07-07 | Altitude dial 2. | Fer de Vries | The top hat | |
| 07-08 | Altitude dial 3. | Fer de Vries | The ring dial | |
| 07-09 | Altitude dial 4. | Fer de Vries | Inclined backplane | |
| 07-10 | Foster-Lambert sundial 1 | Fer de Vries | ||
| 07-11 | Foster-Lambert sundial 2 | Fer de Vries | ||
| 07-12 | Planetary hours | Fer de Vries |