1. The Gemara discusses a dispute about what one may buy with money of Ma'aser Sheni.
2. Rebbi Zeira used to perform a certain Mitzvah when it was difficult for him to learn.
3. Skin and placentas of animals do not become Tamei with Tum'as Ochlin.
4. The Gemara explains the circumstances in which the blessing of Borei Pri ha'Adamah is not said on a vegetable which is going to harden.
5. The Gemara discusses the use of various types of vegetables for making an Eruv.
A BIT MORE
1. One opinion is that one may buy only something which is a "fruit" of something else, and which comes from and is sustained by the ground. The other opinion is that one must buy something that was created from the ground.
2. He used to sit by the doorway of the academy of Rav Yehudah bar Ami and stand up for the elders who passed by.
3. This is because these items are not considered food. However, if a person cooks the skin in order to soften it or wants to eat the placenta, it can become Tamei with Tum'as Ochlin.
4. The Gemara explains that although a radish hardens when it is not eaten within a certain amount of time, its blessing is Borei Pri ha'Adamah since it was planted in order to be eaten when soft. In contrast, when one eats a part of a tree or bush that was not planted with intent to eat that part, he does not recite Borei Pri ha'Adamah on it if it will eventually harden.
5. For many of them, the Gemara explains that a handful is required to make an Eruv, which is the amount that suffices for two meals.