Eruvin 83 - Shabbat October 31, 13 Cheshvan

Study Guide Eruvin 83 This shiur is dedicated by the Greenstone cousins in honor of the birthday of our cousin, Lana Kerzner, a lawyer and advocate of social justice, a role model to the women and men of our family.  The loaf mentioned in the mishna is relevant for various measurements - for what? Why isn't the measurement for food impurities listed in the mishna as that is also based on the loaf. The gemara goes through various measurements and discusses where the size of an egg used in these measurements is exactly an egg or not. The sizes used in measurements got larger over time. What are the differences between them? On what size loaf is one obligated to separate challah? The mishna describes a situation with a porch and a courtyard that had mead an eruv separately as they are considered two separate spaces. If there is an item in the courtyard at a height of 10 handbreadths and close to the porch, it is considered part of the porch. Otherwise, it is considered part of the courtyard.