Article Nº 2811 Word, term or place-name Vol. III · p. 109
Pena of water
Original title: Pena de Agua
A traditional Madeiran measure of water flow, enough to fill a litre (about three quartilhos) per minute, used in selling drinking water.
The quantity of water needed to fill a litre, or about three quartilhos, in the space of one minute. Drinking water is sold by the pena (traditional unit of water flow, roughly 1/60 litre per second), the half-pena and the quarter-pena.