If a jar [of Terumah] was broken in the upper part of the wine-press, and the lower part was unclean, both R. Eliezer [T2 or T5] and R. Joshua [T2] agree that if one can save at least a rebi`ith thereof in cleanness he should save it; but if not, R. Eliezer [T2 or T5] says: let it flow down and become unclean of its own accord, and let him not make it unclean with his own hands.
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If [the area of] a courtyard was less than four cubits no water may be poured out into it on the Sabbath unless it was provided with a trough holding two seah from its edge downwards, irrespective of whether it was without or within, except that if it was without it is necessary to cover it and if it was within it is not necessary to cover it.
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