Study Guide Shabbat 41 Today's shiur is sponsored in honor of Chana Rivka Bracha's birthday by her mother, Malka Abraham. The gemara brings two stories of Rabbi Zeira where he was with other rabbis while they were bathing and learned or tried to learn halachot from what he observed. The mishna describes different types of hot water boilers and can they be used on Shabbat. The mishna describes a case of a hot water boiler where one added cold water to it after it was removed from the fire or emptied. It is a subject of debate which case the mishna was referring to - removed from the fire or emptied? Does the mishna follow Rabbi Yehuda or Rabbi Shimon regarding one who does an act of Shabbat by which a melacha is performed - however one had no intention to perform that melacha.