210.3 Land measure. The acre for land measure shall be measured horizontally and contain ten square chains and be equivalent in area to a rectangle sixteen rods in length and ten rods in breadth, six hundred and forty such acres being contained in a square mile. The chain for measuring land shall be twenty-two yards long, and be divided into one hundred equal parts, called links. [C73, §2041; C97, §3011; S13, §3009-d; C24, 27, 31, 35, 39, §3229; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §210.3]
Iowa Legal Code