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מסכת כלים פרק ז משנה ו

כיצד משערין אותן

How was this (the airspace between three pegs that protruded laterally from a kirah) measured?

רבן שמעון בן גמליאל אומר

Rabban Shimon ben Gamliel says:

נותן את הכנה ביניהם

one places the ruler between them (i.e. one draws a straight line from one peg, at the point that is three fingerbreadths laterally from the body of the kirah, to the same point on the next; when done with all three, this forms a triangle)

מן הכנה ולחוץ

from the ruler outward (i.e. inside the triangular area demarked by the lines drawn with the ruler)


is tahor;

מן הכנה ולפנים

from the ruler inward,

ומקום הכנה

and the space occupied by the ruler,


is tamei.


פרק ח משנה א


A tanur

שחצצו בנסרים

that [had its interior] divided with boards

או ביריעות

or curtains,

נמצא שרץ במקום אחד

if a sheretz was found in one place (on one side of the partition)

הכל טמא

all of it is tamei (on either side of the partition).


A round basket (made of straw or reeds)


that was missing a part of it (and so is no longer considered a utensil),

 ופקוקה בקש

and [that void] was stuffed with straw (which is insufficient to restore its status as a utensil),

ומשלשלת לאויר התנור

and was suspended into the air of the tanur (but the mouth at the top of the basket was at or above the top of the tanur),

השרץ בתוכה

[if a] sheretz is inside it [the basket]

התנור טמא

the tanur is tamei (as the walls of the basket, which was not a utensil, does not shield it);

השרץ בתנור

[if] the sheretz was in the tanur,

אכלין שבתוכה טמאין

foods that were inside it [the basket] are tamei;

ורבי אליעזר מטהר

and Rabbi Eliezer rules it is tahor (with respect to the cases involving the basket in the oven).

אמר רבי אליעזר

Rabbi Eliezer says:

אם הצילה במת

if it protects in the case of a cadaver (where a similarly damaged basket lies halfway inside a house containing a corpse, with the baskets' mouth lying outside the house, the contents of the basket will not become tamei)


which is more stringent,

לא תציל בכלי חרס הקל

should it not protect in an earthenware utensil that is more lenient [when it contains a mere sheretz]?

אמרו לו

They said to him:

אם הצילה במת החמור

If it protects by a cadaver which is more stringent,

שכן חולקים אהלים

that is because we divide canopies (and those partitions are effective in blocking the spread of tumah),

תציל בכלי חרס הקל

should it protect by earthenware utensils that are more lenient

שאין חולקין כלי חרס

[even though] we don't divide earthenware utensils?


נותן את הכנה ביניהם - According to the רמב"ם, the כמה is the base for a כירה, which was an earthenware circle three fingerbreadths wider than the כירה, and the mishna describes placing this base in the middle of the three pegs to measure a circular area within three fingerbreadths of the כירה.

החמור -  A מת can render more items טמא  than a שרץ can, and they remain טמא for a longer period of time