[PAULUS libro quinto decimo ad Sabinum. ] §8.2.28.prForamen in imo pariete conclauis uel triclinii, quod esset proluendi pauimenti causa, id neque flumen esse neque tempore adquiri placuit.
[PAULUS, in the fifteenth book on Sabinus.] It has been held that an opening at the bottom of the wall of a room or a dining room, which is for the purpose of washing the floor, is neither a stream nor can it be acquired by lapse of time.
hoc ita uerum est, si in eum locum nihil ex caelo aquae ueniat (neque enim perpetuam causam habet quod manu fit): at quod ex caelo cadit, etsi non assidue fit, ex naturali tamen causa fit et ideo perpetuo fieri existimatur.
This is true only if no water from the sky comes into that place (for what is done by hand does not have a permanent cause); but what falls from the sky, even if it does not happen continuously, nevertheless happens from a natural cause and is therefore deemed to happen permanently.
omnes autem seruitutes praediorum perpetuas causas habere debent, et ideo neque ex lacu neque ex stagno concedi aquae ductus potest.
Moreover, all praedial servitudes must have permanent causes, and therefore a right of conducting water can be granted neither from a lake nor from a pond.
stillicidii quoque immittendi naturalis et perpetua causa esse debet.
The cause for discharging dripping water must also be natural and permanent.