[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.