GA 351
| Date | Title | City |
|---|---|---|
| 08 Oct 1923 | The Nature of Butterflies | Dornach |
| 10 Oct 1923 | Lecture for the Workers at the Goetheanum | Dornach |
| 13 Oct 1923 | Man and Earth in North and South | Dornach |
| 20 Oct 1923 | On the Nature of Hydrogen | Dornach |
| 24 Oct 1923 | On the Nature of Comets | Dornach |
| 27 Oct 1923 | Effects of Substances in the Cosmos and in the Human Body. Iron, Sodium, Carbon and Chlorine | Dornach |
| 31 Oct 1923 | On the Causes of Polio. Of Plant Growth | Dornach |
| 10 Nov 1923 | Remarks to the Workers at the Goetheanum Relating to a Lecture by Beekeeper Mueller on Beekeeping | Dornach |
| 26 Nov 1923 | On Beekeeping 1 | Dornach |
| 28 Nov 1923 | On Beekeeping 2 | Dornach |
| 01 Dec 1923 | On Beekeeping 3 | Dornach |
| 05 Dec 1923 | On Beekeeping 4 | Dornach |
| 10 Dec 1923 | On Beekeeping 5 | Dornach |
| 12 Dec 1923 | On Beekeeping 6 | Dornach |
| 15 Dec 1923 | On Beekeeping 7 | Dornach |
| 22 Dec 1923 | On Beekeeping 8 | Dornach |