Beitzah 15a and Beitzah 15b, finishing the first chapter with a few examples of what we can and cannot use on Yom Tov, ending with a discussion of how to protect tefillin if in an unprotected place on Shabbat and Yom Tov. Then, new chapter on eruv tavshilin, why and how we prepare food before Yom Tov to be allowed to cook on Yom Tov for Shabbat (and whether enjoying Yom Tov physically is a necessary version of simhat Yom Tov).
