(Mishnah): If a ditch [along the entire border] between two Chatzeros is 10 deep and four wide, they may be Me'arev two, but not one, even if it is full of straw or stubble;

If it is full of earth or pebbles, they may be Me'arev one, but not two.

(Gemara) Inference: If he put straw and was Mevatel it (decided to leave it there permanently), it is not Batel. Our Mishnah is unlike R. Yosi;

R. Yosi said that if he put straw and was Mevatel it, it is Batel.

(R. Yosi bei R. Bun citing Rav Chisda): Our Mishnah is like everyone. R. Yosi said [that it is Batel] when he mixed the straw in the earth. (Our Mishnah discusses when he did not mix it.)

(A Mishnah (Ohalos 15:6) teaches that if a Mes is in a house, if it is full of earth or pebbles, the Tum'ah breaks through. I.e. they are considered Batel, so there is not an Ohel of a Tefach. This implies that straw is not Batel.) There is straw that is [Batel] like earth, and earth that is [not Batel,] like straw;

Straw that he will not remove it, it is [Batel] like earth. Earth that he will remove, it is [not Batel,] like straw.

(R. Yanai's academy): If he covered [the Mes] with mats, he was Mevatel [them].

See [how this is]. If he filled [the house] with mats, he was not Mevatel [them]. If he covered [the Mes] with mats, he was Mevatel [them].

Question: If he filled [the house] with date branches [what is the law]?

(R. Zerikan citing R. Ami citing Reish Lakish): (Our Mishnah said that even if it is full of earth or pebbles, they may be Me'arev one, but not two. The same applies) even if [the top of the ditch] is empty (just there is earth on the bottom and less than 10 empty Tefachim above it).

(Mishnah): If one put a plank [across the ditch], as long as it is four [Tefachim] wide [it is an opening, so they may be Me'arev separately or together].

The same laws apply to two balconies opposite each other. [If four Tefachim separate them,] they may be Me'arev two. If they want, they may be Me'arev one. Less than this (this will be explained), they may be Me'arev two, but not one.

(Gemara): Some teach [in the Seifa] that they may be Me'arev two, but not one. Some teach that they may be Me'arev one, but not two;

The one who said that they may be Me'arev two, but not one, "less than this'' refers to the plank (it is less than four wide). The one who said that they may be Me'arev one, but not two, "less than this'' refers to the gap between them (it is less than four).

(Mishnah): If a haystack [along the entire border] between two Chatzeros is 10 tall, they may be Me'arev two, but not one;

These (members of this Chatzer) may feed [their animals] from here (their side of the stack), and these may feed from here.

If the stack became less than 10 Tefachim [tall along the entire border, or for more than 10 Amos], they may be Me'arev one, but not two.

(Gemara - R. Elazar): Our Mishnah [permits not only to bring animals to eat. Rather,] these may [even] bring their basket and feed [their animals, and] these may bring their basket and feed.

(R. Chagai): When we sat [to learn] in front of Menachem, we used to say [that R. Elazar teaches that] you should not say that [taking in baskets] is like destroying an Ohel.

If the straw was flattened, one may support it with the sides of the basket. This is like supporting an Ohel (which is permitted on Shabbos).

Question (R. Hoshayah): If one made a wall with a sheet and supported it on a chair, what is the law (may one rely on it)?

Perhaps here (it will remain on the chair) only for a short time (so one may not rely on it), and here (a stack of straw) is for a long time (so it is permitted)!

(Beraisa): A haystack between two Chatzeros - this one opens its opening from here and feeds [their animals], and this one opens its opening from here and feeds;

If [the stack] became less than 10 Tefachim, both are forbidden until they are Me'arev. Therefore, if one wanted to close its opening and be Mevatel its Reshus, it is forbidden and the other is permitted. The same applies to a house between two Chatzeros.

Inferences: We can be Mevatel from Chatzer to Chatzer. [We can be Mevatel] even if they were not Me'arev. [We can be Mevatel] even if they did not intend [from before Shabbos].

Inference: Two Reshuyos cannot use one Reshus. (This is why we forbid when it is less than 10.)

Inference: [Even if] this has an opening and this has an opening, both are forbidden.

[The Beraisa said] "the same applies to a house between two Chatzeros'' (it closes its opening and is Mevatel its Reshus, and permits the other). This is unlike R. Meir, who says that a locked house is forbidden.