PERCH (through Fr. perche from Lat. pertica, a pole or rod used for measurement), a bar or rod used for various purposes, as e.g. for a navigation mark in shallow waters, for a support on which a bird may rest, or for a pole which joins the back with the fore part of a wagon or other four-wheeled vehicle. As a term of linear measurement, " perch," also " rod " or " pole," = i6| ft., 53 yds.; of superficial area, = 3Oj sq. yds.; 160 perches = i acre. As a stonemason's measure, a " perch " = i linear perch in length by ij ft. in breadth and i ft. in thickness.
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)