REVIEW QUESTIONS ON GEMARA AND RASHI
prepared by Rabbi Eliezer Chrysler
Kollel Iyun Hadaf, Jerusalem
Previous dafEruvin 87
ERUVIN 87 - has been dedicated by Rabbi Dr. Eli Turkel of Ra'anana,
Israel, to the memory of his father, Yisrael Shimon ben Shlomo ha'Levi
(a) Rabah equates Rebbi Yehudah in our Mishnah (who permits a Mechitzah
over the Uka even if it does not reach the walls of the Uka) with Rebbi
Chananya ben Akavya.
What does *he* say regarding a board of four Amos by
four Amos, and what is the connection between them?
(b) Why might ...
- ... Rebbi Yehudah not agree with Rebbi Chananya ben Akavya?
- ... Rebbi Chananya ben Akavya not agree with Rebbi Yehudah?
(a) Abaye points out that if the plank of which Rebbi Chananya ben Akavya
speaks would be lying on two brackets that were fixed to a wall, with the
edge of the plank within three Tefachim from the wall, it would only need
to be eleven Tefachim and a fraction of a Tefach wide by Ten Amos. Why is
(b) What would the dimensions of the board need to be if, in the previous
case, it was placed ...
(c) Considering the three previous cases, how was the plank in the
original case of Rebbi Chananya ben Akavya placed?
- ... *vertically* rather than horizontally, and how far from the wall would it need to be placed ...?
- ... vertically within three Tefachim of *a corner*, rather than a wall?
(a) What status does a stream of water (of four Tefachim wide and ten
tefachim deep) that passes through a Chatzer have (i.e. what Reshus is
it), and what must one do to permit the residents of the Chatzer to draw
What is the status of a stream of water that is less than ten Tefachim
deep and four Tefachim wide, if it passes through ...
(b) Why will a Mechitzah Teluyah not help here?
(c) What does Rebbi Yehudah hold in this case?
(d) Rebbi Yehudah tries to prove his point from the stream of Avel, which
the elders permitted via a Mechitzah Teluyah.
On what grounds do the
Rabbanan refute Rebbi Yehudah's proof?
- ... a Reshus ha'Rabim?
- ... a Reshus ha'Yachid?
(a) If a stream passes by the windows of a series of houses in a Mavoy or
a Chatzer, the Tana Kama permits lowering a bucket when there are *three*
Tefachim, and Raban Shimon ben Gamliel when there are *four*? What are
they talking about, and what is the basis of their Machlokes?
Answers to questions
(b) Why does the Gemara reject the suggestion that they are arguing about
the width of the stream?
(c) How do we reconcile this with Rav Dimi Amar Rebbi Yochanan, who
forbids using a Makom Petur to switch from one Reshus to another?
(a) We just learnt that Rav Dimi quoting Rebbi Yochanan permits switching
from one Reshus to another (provided they are not both Reshuyos d'Oraysa)
via a Makom Petur.
Ravina comes up with a surprise explanation in the Machlokes Raban Shimon
ben Gamliel and the Rabbanan (whether the stream is permitted by *three*
Tefachim or *four*).
How do we then explain Rebbi Yochanan above (77a) who
permits the residents of both courtyards to use a wall that is not four
Tefachim wide, provided they do not switch from one Chatzer to the other
(even though they are not Reshuyos d'Oraysa)?
(b) How will Ze'iri explain the Machlokes between the Tana Kama and Raban
Shimon ben Gamliel in the Beraisa?
(c) What does the Gemara mean when it asks on Ze'iri 've'Tehavi Ki Chorei
(d) Some answer that there is no Din of Chorin by a Karmelis.
Rav Ashi say about that?
What is it?
(a) Why, according to the Tana of our Mishnah, will a horizontal ledge
suspended above the water not permit one to draw water on Shabbos -
irrespective of its size?
(b) What must one then do to be able to draw water from below?
(c) Rebbi Chananya ben Akavya permitted the men of Teverya to draw water
via a horizontal ledge of four square Amos, as we learnt above. He also
permitted them to wrap with Atza (the waste of legumes). This had nothing
to do with Shabbos.
In which connection did he issue this ruling?
(a) The third concession of Rebbi Chananya ben Akavya to the men of
Teverya concerned drying oneself after bathing.
Answers to questions
What was it?
(b) What does Rebbi Shimon permit in this regard, over and above the Tana
Kama of the Beraisa?
(c) Why does the Tana Kama forbid carrying the towel home?
(d) Why is giving the towel to the bath-attendant prohibited?