R’ Yehoshua says: [If] a niddah sat together with a tahor woman on a bed, the cap on her head contracts midras tumah. If [the niddah] sat in a boat, utensils that are on top of the mast of the boat contract midras tumah. [If the niddah] carries a tub full of clothing, if it is heavy, [the articles of clothing] are [rendered] tamei. If it is light, they remain tahor.  [If] a zav struck [a blow] on a balcony, and [caused] a loaf of terumah [bread] to fall, [the loaf] re-mains tahor.

[If the zav] struck [a blow] on a crossbeam, on a frame, on a gutter-board, on a plank —- even though it is [merely] tied down with ropes —- on an oven, on the receptacle [of the flour mill], on the base of a millstone, on the base of a hand[-powered] mill, or on the measure of an olive grinder, [and] R’ Yose says: Additionally, [a zav who strikes] on the beam of the bathhouse attendant; [in all of these cases, the loaf that falls] remains tahor.

[If the zav] struck [a blow] on a door, on a door-bolt, on a lock, on an oar, or on a [mill] receptacle; on a weak tree, or on a weak branch [that grows from] a strong tree, on an Egyptian ladder that is not anchored with a nail, on a ramp, on a beam, or on a door that are not secured with plaster, [in all these cases, the loaves that fall] are tamei.  [If the zav] struck [a blow] on a carriage, a chest, or a closet, [the loaves that fall] are tamei. [However,] R’ Nehemiah and R’ Shimon rule these tahor.

[In a case of] a zav who was lying upon five benches, or upon five money belts, [if he lies] along their length, they are [all] tamei; [however, if he lies] across their widths, they are [all] tahor. If he slept, [and there is] a doubt that he [may have] turned around on them, they are [all] tamei.  If [the zav] was lying upon six chairs, [with] his two arms [resting] upon two [of them], his two legs [resting] upon two [of them], his head upon one, [and] his body upon one, only this [one] that is be-neath [his] body is tamei.  [If the zav was] standing on two chairs, R’ Shimon says: If they are distant one from the other, they are tahor.