Rabbi Baruch Bodenheim: Gemara Shabbos: Perek Kirah, יום שני, Av 24, Daf 40b (08/18/25)
Very quickly review the גמרא דף מ: “א”ר יצחק בר אבדימי (middle of the wide lines) until “היכי עביד הכי”
Learn the רי”ף who has a different Girsa in the third Halacha.
Learn the ר”ן who explains the difference.
https://hebrewbooks.org/pdfpager.aspx?req=37953&st=&pgnum=587
Question:
Is it permitted to place water near a fire to warm up when the fire will go out before the water heats up to יד סולדת?
Learn שולחן ערוך אורח חיים ס’ שי”ח סע’ יד & משנה ברורה ס”ק צ & צא
https://hebrewbooks.org/pdfpager.aspx?req=60388&st=&pgnum=280&hilite=
Learn אגרות משה או”ח חלק א ס’ צג
https://hebrewbooks.org/pdfpager.aspx?req=916&st=&pgnum=152
https://hebrewbooks.org/pdfpager.aspx?req=916
Learn שמירת שבת כהלכתו פרק א הערה ח
Why is the case of a timer that will shut off the electricity before the water can get hot different from heating towels?
Major Question:
Why is it permitted to place uncooked food in a כלי שני? Why should a כלי שני be different than a כלי ראשון if the temperature of the water is still hot enough to cook?
Learn תוס’ “ושמע מינה
Question on Tosfos:
What is the exact reason why kli sheini can not cook. Is it because the walls cool down the liquid or is it because the walls are not hot?
Would a thermos be considered a kli sheini?
Learn אגרות משה או”ח חלק א end of ס’ צה “וטעם זה
https://hebrewbooks.org/pdfpager.aspx?req=916&st=&pgnum=156
and חזון איש או”ח סוף ס’ לז
https://hebrewbooks.org/pdfpager.aspx?req=14336&st=&pgnum=114
Learn שמירת שבת כהלכתו פרק א סע’ ב אות ג & הערה ט
and קובץ הלכות שבת חלק ב פרק כה סע’ ט & הערה יח
Continue learning the גמרא דף מה: “היכי עביד הכי until “א”ר זירא ” (three lines from the bottom of the Amud)
Why is it prohibited to even think about Torah in the bath house?
Why is it permitted to tell someone in the bath house that an action they are doing or about to do is prohibited?
The next Gemara deals with the topic of swimming on Shabbos
Learn the גמרא דף מ: “א”ר זירא (three lines from the bottom of the Amud) until the two dots on top of דף מא
