Topics covered: Chapter 9, Mishna 1 Tribute to Rabbi Lord Jonathan Sacks of blessed memory. May we carry from rooftop to rooftop on Shabbos? Sages strongly disagree on this question. To help clarify their positions we examine the cases …

  Topics covered: Chapter 8, Mishna 8, 9 and Chapter 9, Mishna 1 Why did Rabbi Chananya ben Akavya permit the residents of the Sea of Galilee to dry themselves with towels on Shabbos? May we do the same? May …

  Topics covered: Chapter 8, Mishna 6, 7, 8 Does the leniency of Rabbi Yehuda, who permits residents of neighboring courtyards to draw water from a shared well on their boundary so long as a proper wall passes over it, …

  Topics covered: Chapter 8, Mishna 5, 6 Does an absent resident restrict his neighbors from carrying on Shabbos in a shared courtyard if he didn’t join in their eruv before leaving? Depends on whether he’s Jewish or not, and …

  Topics covered: Chapter 8, Mishna 3, 4 Shared area of two courtyards that did not make a joint eruv are prohibited to both courtyards. What if there is a well in an alleyway between two courtyards? Why does Rav …

  Topics covered: Chapter 8, Mishna 1,2 How do we establish eruvin techumin, joining of Shabbos boundaries, for multiple people? May we do so only for the purpose of a fulfilling a commandment? Why is it more important to visit …

  Topics covered: Chapter 8, Mishna 2, 3 An eruv techumin, joining of Shabbos boundaries, requires enough food for two meals from each participant. How much food is that? We measure using egg volumes. For larger quantities of grain, we …

  Topics covered: Chapter 7, Mishna 7, 8 Which eruvs must be established with bread? If with bread, why must we use whole loaves of bread? What is challah and how does it relate to the food used to establish …

  Topics covered: Chapter 7, Mishna 5, 6 May we establish a merging of alleyways without conveying possession of the food (used in the eruv) to all residents who benefit from the eruv? To understand the principle involved, we examine …