Two mishnayot on the daf. First, one cannot hollow out clay to make a lamp because that is making a vessel. Ditto making charcoal or a wick. Plus, Bar Kapra - all kinds of laws about wicks! Also, Rav Nathan bar Abba on several things cited in his name, including commentary on the Jews of Babylonia. [What's What: The eruv rav] Also, you can't cut paper to roast fish. And you can't set up barrels to provide a base for a pot to cook over a fire between the barrels. Among other such cooking issues. Plus, setting up a toilet, and why it's okay.