[If] part of the tumah is in the house and part of it is opposite the skylight, the house becomes tamei, and whatever is opposite the tumah [also] becomes tamei; these are the words of R’ Meir. R’ Yehudah says: The house becomes tamei, but whatever is opposite the skylight remains tahor. R’ Yose says: If the tumah is large enough that when divided in half it can contaminate both the house and whatever is opposite the tumah, [they are both] tamei; if not, the house becomes tamei, [and] whatever is opposite the tumah is tahor.

[If] there are [two] skylights, one above the other, each the size of a square hand-breadth, [and] tumah is in the house, whatever is directly opposite the skylights re-mains tahor. [If] the tumah is directly opposite the skylights, the house remains tahor. [If] the tumah is either in the house or directly opposite the skylights, and an item susceptible to tumah is placed over either the upper or the lower skylight, eve-rything becomes tamei. [If] an item not susceptible to tumah [is placed over the skylight], whatever is below the item becomes tamei; and whatever is above it remains tahor.