If a house was cracked, if there is impurity outside, vessels that are inside are pure. If there is impurity inside, vessels that are outside, Beit Shammai says [they are pure] unless the crack is four handbreadths wide, but Beit Hillel says any size[d crack]. Rabbi Yosi says in the name of the House of Hillel that it must be a handbreadth's space.

If a colonnade was cracked, if there is impurity on one side [of the crack], vessels on the other side are pure. If he put his foot or a reed on top of it, he has combined the impurity. If he placed the reed on the ground, he does not spread the impurity, until it is at least a handbreadth above the ground.

A thick coat and a thick block do not spread impurity until they are a handbreadth above the ground. Folded garments on top of each other do not spread impurity until the top one is a handbreadth above the ground. If there was a person placed there,Beit Shammai says he does not spread the impurity but Beit Hillel says, a person is hollow and therefore the upper part spreads impurity.

If he was looking out a window and he overshadowed people who bury dead bodies, Beit Shammai say, he does not spread impurity, but Beit Hillel say he does spread impurity. And they agree that if he was wearing his clothing or if there were two above each other, they spread impurity.

If he was lying on the threshold and he overshadowed people who bury dead bodies, Beit Shammai say he does not spread impurity, but Beit Hillel say he does spread impurity.

If the impurity was in a house and pure people overshadowed it,Beit Shammai say they are pure, but Beit Hillel say they are impure.

A dog who ate the flesh of a dead body, and the dog died and was lying on the threshold, Rabbi Meir says, if his neck has a space that is a handbreadth he spreads the impurity, but if not he does not spread the impurity. Rabbi Yosi says we check the impurity, [if it is found] from the threshold and inside, the house is impure, [if found] from the threshold and out, the house is pure. Rabbi Elazar says if his mouth faces to the inside, the house is pure, but if it faces to the outside, the house is impure, since the impurity leaves by way of his rear. Rabbi Yehuda Ben Betaira says in either case the house is impure. How long does it stay in his innards? Three days from the time [of day it was eaten] to that time [of day three days later]. By birds and fish, long enough for it to fall in the fire and be burned, says Rabbi Shimon. Rabbi Yehuda ben Betaira says by birds and fish it is from the time [of day it was eaten] to that time [of day one day later].

If a cistern was in a house and a candlestick was inside it and its flower-shaped ornament was sticking out and a basket [which is unable to become impure] was placed over it in a way that if the candlestick would be taken out the basket would stand on the mouth of the cistern, the House of Shammai say the cistern is pure but the candlestick is impure. The House of Hillel say even the candlestick is pure. And they agree that [if the basket was placed in a way that] if the candlestick would be taken out the basket would fall, everything is impure.

Vessels that are between the rims of a basket and the rims of a cistern, even until the depths, they are pure. If there was impurity there, the house would be impure. If there was impurity in the house, vessels in the walls of the cistern, if there was in their place a space that is a handbreadth by a handbreadth by a handbreadth height, they are pure, but if not they are impure. If the walls of the cistern were thicker than the house, in either case they are pure.