מכשירין ב׳Makhshirin 2

Mishnah 3ג׳

שְׁתֵּי בְרֵכוֹת, אַחַת טְהוֹרָה וְאַחַת טְמֵאָה, הַמַּזִּיעַ קָרוֹב לַטְּמֵאָה, טָמֵא. קָרוֹב לַטְּהוֹרָה, טָהוֹר. מֶחֱצָה לְמֶחֱצָה, טָמֵא. בַּרְזֶל טָמֵא שֶׁבְּלָלוֹ עִם בַּרְזֶל טָהוֹר, אִם רֹב מִן הַטָּמֵא, טָמֵא. וְאִם רֹב מִן הַטָּהוֹר, טָהוֹר. מֶחֱצָה לְמֶחֱצָה, טָמֵא. גִּסְטְרָיוֹת שֶׁיִּשְׂרָאֵל וְנָכְרִים מַטִּילִין לְתוֹכָהּ, אִם רֹב מִן הַטָּמֵא, טָמֵא. וְאִם רֹב מִן הַטָּהוֹר, טָהוֹר. מֶחֱצָה לְמֶחֱצָה, טָמֵא. מֵי שְׁפִיכוּת שֶׁיָּרְדוּ עֲלֵיהֶן מֵי גְשָׁמִים, אִם רֹב מִן הַטָּמֵא, טָמֵא. וְאִם רֹב מִן הַטָּהוֹר, טָהוֹר. מֶחֱצָה לְמֶחֱצָה, טָמֵא. אֵימָתַי, בִּזְמַן שֶׁקָּדְמוּ מֵי שְׁפִיכוּת. אֲבָל אִם קָדְמוּ מֵי גְשָׁמִים, אֲפִלּוּ כָל שֶׁהֵן, לְמֵי שְׁפִיכוּת, טָמֵא:

[If a house has] two pools, one that is pure and one that is impure, [and the wall that] exudes moisture is close to the impure one [the moisture] is impure; [if the wall that exudes moisture] is close to the pure one [its moisture] is pure. If it is half and half [they are equidistant to the moisture] it is impure. [If] one mixed impure iron with pure iron [in fashioning a utensil]: If the majority [of it] is from impure [metal] it is impure; and if the majority is from pure [metal] it is pure; [if] it is half and half it is impure. [If there are] chamber-pots which Jews and gentiles make use of: If most [of the urine] is impure [that is, from the gentiles] it is impure; if most [of the urine] is pure it is pure; [if it is half and half] it is impure. [If] rain water fell into waste water: If most [of the mixture] is from the impure [waste water] it is impure; and if most is from the pure [rain water] it is pure; [if] it is half and half it is impure. When [are these laws applicable]? When the waste water came first [and the rain fell into it]; but if the rain water came first [the mixture] is impure even if it [the rain] was a trace amount into which the waste water [fell].

Mishnah 4ד׳

הַטּוֹרֵף אֶת גַּגּוֹ וְהַמְכַבֵּס אֶת כְּסוּתוֹ וְיָרְדוּ עֲלֵיהֶן גְּשָׁמִים, אִם רֹב מִן הַטָּמֵא, טָמֵא. וְאִם רֹב מִן הַטָּהוֹר, טָהוֹר. מֶחֱצָה לְמֶחֱצָה, טָמֵא. רַבִּי יְהוּדָה אוֹמֵר, אִם הוֹסִיפוּ לְנַטֵּף:

[If] one plasters his roof or launders his clothing and rain fell into them [the waste water used for those activities]: [If] most [of the mixture] is from the impure [waste water] it is impure; and if most it is from the pure [rain water] it is pure; [if] it is half and half it is impure. Rabbi Yehudah says: If [the volume of] the dripping increased.