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Learn to edit; Community portal; Recent changes; ... perch (H) rd ≡ 16 + 1 ⁄ 2 ft = 5.0292 m ... 1 ⁄ 100 of the energy required to warm one gram of air-free ...
The rod, perch, or pole (sometimes also lug) is a surveyor's tool [1] and unit of length of various historical definitions. In British imperial and US customary units, it is defined as 16 + 1 ⁄ 2 feet, equal to exactly 1 ⁄ 320 of a mile, or 5 + 1 ⁄ 2 yards (a quarter of a surveyor's chain), and is exactly 5.0292 meters.
perch, used variously to measure length or area; acre and acre's breadth; furlong; mile; The best-attested of these is the perch, which varied in length from 10 to 25 feet, with the most common value (16 1 ⁄ 2 feet or 5.03 m) remaining in use until the twentieth century. [1] Later development of the English system continued in 1215 in the ...
In French North America, it was also equal to 25 square perches, but the royal perch of 18 feet was used, yielding a vergée of 8100 square feet (854.7 m 2) In Guernsey, a vergée (Guernésiais: vergie) is 17,640 square feet (1,639 m 2). It is 40 (square) Guernsey perches. A Guernsey perch (also spelt perque) is 21 feet by 21 feet. [1] [2]
It is ordained that 3 grains of barley dry and round do make an inch, 12 inches make 1 foot, 3 feet make 1 yard, 5 yards and a half make a perch, and 40 perches in length and 4 in breadth make an acre. [2] [3]: 277 A similar statement is made in Liber Horn (as published in The Statutes of the Realm):
Since an acre measured 10 square chains in Gunter's system, the entire process of land area measurement could be computed using measurements in chains, and then converted to acres by dividing the results by 10. [2] Hence 10 chains by 10 chains (100 square chains) equals 10 acres, 5 chains by 5 chains (25 square chains) equals 2.5 acres.
The Irish acre or plantation acre measured one Irish chain by one Irish furlong, or 4 Irish perches by 40, or 7840 square yards: approximately 0.66 hectares or 1.62 statute acres. [54] The Lancashire acre around the Solway Firth and the Churchland acre in Yorkshire were the same size, which Frederic Seebohm in 1914 connected to the erw of Gwent ...
Stocking measures account for three things: the cover type and species mixture in the stand, the basal area per acre, and the number of trees per acre. [3] Stocking allows for comparing stands that may have diverse ecology. [4] Stocking is a major part of forest management, both in commercial applications and for restoration or preservation.