Rabbi Baruch Bodenheim: Gemara Shabbos: Perek Kirah, יום חמישי, Rosh Chodesh Cheshvan II, Daf 42a Sugya – Kli Sheini (10/23/25)

Gutten Chodesh 

Learn the גמרא דף מב. “סבר רב יוסף למימר until אמר רב הונא בריה דרב יהושע (eight lines from the bottom of the Amud)

Review תוס’ “אבל

Tosfos explains the אמבטיה in the Halacha of our Gemara is a Kli Sheini. 

Why is it forbidden to pour cold water into the bath if it’s a Kli Sheini?

Bring a proof from Rashi whether the bath is a Kli Rishon or a Kli Sheini 

Tosfos – תוס’ “נותן have a new explanation to the case of חמין לתוך צונן & צונן לתוך חמין different than Rashi. 

Rashi – dependant on the cup that is being poured into as that is תתאה גבר 

Tosfos – it is not dependent on תתאה גבר. Rather it’s dependant on volume. According to Bais Shammai if the hot water has a larger volume than the cold water than it is prohibited to mix the them. 

Learn רי”ף

Learn ר”ן 

https://hebrewbooks.org/pdfpager.aspx?req=37953&st=&pgnum=588

https://hebrewbooks.org/pdfpager.aspx?req=37953&st=&pgnum=589

In what way is the Ran’s explanation of the Gemara different than the explanation of Tosfos? 

Is it permitted to pour an abundance of cold water into a bath that is a Kli Rishon?