[If] a woman was pickling greens in a pot, and she touched a leaf that was outside the pot, on a dry spot, even though it has the volume of an egg, it is tamei, but all [the rest] is tahor. [If] she touched on a wet spot: if it contains the volume of an egg, eve-ry-thing is tamei; [if] it does not contain the volume of an egg, it is tamei and everything [else] is tahor. [If] it returned to the pot, everything is tamei.  [If] she was tamei as a result of contact with one who contracted tumah from a corpse, and she touched either a wet spot or a dry spot: if it con-tains the volume of an egg, everything is tamei; [if] it does not contain the vol-ume of an egg, it is tamei and everything [else] is tahor.  [If] a woman who was a tevul yom was pouring out [the con-tents of] the pot with unwashed hands, and she saw liquid on her hands, [and] it is uncertain whether it sprayed from the pot or whether the stalk touched her hands, the greens are disqualified, but the pot is tahor.

R’ Eliezer says: One who eats a rishon food [becomes] a rishon; a sheni food, [becomes] a sheni; a shlishi food, [becomes] a shlishi. R’ Yehoshua says: One who eats a rishon food or a sheni food [becomes] a sheni; [if he eats] a shlishi [food, he becomes] a sheni for sacrificial things but not a sheni for terumah; with chullin that was made to the taharah standards of terumah.

The rishon of chullin can become tamei and can contaminate with tumah; the sheni disqualifies, but does not contaminate with tumah; and the shlishi may be eaten in a dish containing terumah.

The rishon and the sheni of terumah are tamei and contaminate with tumah; the shlishi disqualifies and does not contaminate with tumah; and the revi’i may be eaten in a dish containing sacrificial foods.