An earthenware utensil that has three rims: [If] the inner one is higher, everything is tahor; [if] the outer one is higher, everything is tamei; [if] the middle one is higher, [then everything] from it and inward is tamei, [while everything] from it and outward is tahor. [If] they were even: R’ Yehudah says: We divide the middle [receptacle]. But the Sages say: Everything is tahor. From which point do earthenware utensils contract tumah? From when they are fired in the kiln, and this is the completion of their manufacture.

An oven: Its beginning is four [handbreadths] and its remnants are four [handbreadths, these are] the words of R’ Meir. But the Sages say: When do these words apply? In [the case of] a large [oven], but in [the case of] a small [oven], its beginning is the smallest amount and its remnants are the majority of it. [The above applies] from the time its manufacture is complete. What is [considered] the completion of its manufacture? From when one heats it enough to bake sponge cakes in it. R’ Yehudah says: When one heats a new [oven] enough to bake sponge cakes in an old [oven].

A stove: Its beginning is three [fingerbreadths] and its remnants are three [fingerbreadths], from the time its manufacture is completed. What is [considered] the completion of its manufacture? From when one heats it enough to cook on it the most easily cooked egg, [which has been] beaten and put into a stewpot. A kupach: [If] one made it for baking, its measure is that of an oven; [if] one made it for cooking, its measure is that of a stove. A stone that juts out one handbreadth from an oven, or three fingerbreadths from a stove, [is] a connection. [A stone] that juts out of a kupach: [If] one made it for baking, its measure is that of an oven; [if] one made it for cooking, its measure is that of a stove. R’ Yehudah said: They only said ‘‘one handbreadth’’ between the oven and the wall. [If] two ovens were adjacent to each other, one handbreadth is allotted to one [oven] and one handbreadth to the other [oven], and the remainder is tahor.

The rim of a stove is tahor. The enclosure of an oven: When it is four handbreadths high it contracts tumah via contact and airspace, [but] less than this is tahor. If it was connected to [the oven], even on three stones, it is tamei. The flask receptacle and the spice receptacle and the lamp receptacle of a stove contract tumah via contact but do not contract tumah via airspace, [these are] the words of R’ Meir. R’ Yishmael rules [them] tahor.