Investigating (final?) details about what makes an animal a treyfa - in terms of injuries. Is there a rule of thumb, or is the list of what makes an animal a treyfa complete, in terms of listing all the possibilities? But then the Gemara walks back the question... Also, a new mishnah! On how much damage can be done to the trachea (and other body parts), and the animal remains kosher. Plus, a comparison between two mishnayot that seem to contradict each other in methodology. Also, more on the perforation of a trachea -- and how the measure that keeps the animal kosher is less than an Italian issar - but that wasn't helpful in Babylonia, where they weren't familiar with the coin. Plus, the job of the money-changer who tried to stand up in honor of Rabbi Yochanan, who declined the honor because of the job at hand. Plus, the time the tradesmen stood up to honor those bringing their first fruits (bikkurim) to Jerusalem.