| First Lecture | September 13, 1914 | |
| Second Lecture | December 3, 1914 | |
| Third Lecture | March 23, 1915 | |
| Fourth Lecture | November 29, 1915 | |
| Seventh Lecture | May 20, 1917 | |
| Eighth Lecture | May 21, 1917 | |
| Eleventh Lecture | May 2, 1918 | |
| Twelfth Lecture | May 4, 1918 |
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