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|ERUVIN 76 (14 Sivan) - Dedicated by Doug Rabin in memory of his mother, Leah Miriam bat Yisroel (Lucy) Rabin, in honor of her Yahrzeit.|
1. If a person makes two Eruvei Techumin for two people, the period of Bein ha'Shemashos can be considered daytime for one and nighttime for the other.
2. The Gemara explains why this ruling (#1) is not contradictory.
3. The Mishnah discusses how a window between two courtyards may allow the courtyards to join to make one Eruv.
4. Rebbi Yochanan discusses how the Mishnah's law would apply to a circular window.
5. Rav Nachman: The Mishnah refers to a window specifically in the wall between the two courtyards, not a window between two houses.
A BIT MORE
1. If he placed the Eruv for one person in its place before Bein ha'Shemashos and it was eaten or destroyed during Bein ha'Shemashos, and he placed the Eruv for the second person during Bein ha'Shemashos but it was around after Bein ha'Shemashos, both Eruvin are valid. For the first Eruv, Bein ha'Shemashos is considered night, and for the second Eruv, it is considered day.
2. Since Bein ha'Shemashos is treated as two different time periods for two different Eruvin, the contradiction is not recognizable.
3. If the window is four by four Tefachim and some of it is within ten Tefachim from the ground, it enables a joint Eruv to be made (even when there is nothing else connecting the two courtyards).
4. He says that if the window has a circumference of 24 Tefachim, and a little more than two of those Tefachim are within ten Tefachim from the ground, it enables the two courtyards to make one Eruv.
5. If the window is between two houses that are in the two different courtyards, they may make a joint Eruv even if the window is entirely above ten Tefachim from the ground.
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