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.

An oven that was heated from the outside, or that was heated without his intent, or that was heated in the artisan’s workshop, is tamei. It once happened that a fire broke out among the ovens of Kefar Signah, and the case came to Yavneh, and Rabban Gamliel ruled [the ovens] tamei.