In the back there are some notes on miscellaneous subjects. --Like the time of the new moon. I have mentioned before this that I think the new moon should calculated from the Molad conjunction.
Also I put in a little essay on the time the night begins according to Rabbainu Tam. And also a small essay about the idea that Halacha depends on what the Talmud says and that later authorities can only clarify, but not supersede.
There is another small book on ideas in Shas, but it needs more editing.