Square or Superficial MEASURES. English square or superficial measures, are raised from the yard of 36 inches multiplied into itself, and thus producing 1296 square inches in the square yard: the divisions of this are square feet and inches; and the multiples, poles, roods, and acres, as in the following table.

Inches
144 Feet
1296 9 Yards
3600 25 2\frac{1}{2} Paces
39204 272 \frac{1}{2} 30 \frac{1}{2} 10.89 Poles
1568160 10890 1210 435.6 40 Rood
6272640 43560 4840 1743.6 160 \frac{1}{4} Acre

Measure. Grecian square measures were the plethron, or acre, by some said to contain 14,400, by others, 10,000 square feet; and aroura, the half of the plethron. The aroura of the Egyptians was the square 100 cubits.

Roman Square-MEASURE reduced to English.

This integer was the jugerum or acre, which the Romans divided like the libra, or as: thus the jugerum contained

square feet. scruples. Eng. roods. sq. poles. Square feet.
As 28800 288 2 18 250.05
Denix 26400 264 2 16 183.85
Dextans 24000 240 2 14 117.64
Dodrans 21600 216 1 34 51.42
Bes 19200 192 1 25 257.46
Septunx 16800 168 1 17 191.25
Semis 14400 144 1 9 125.03
Quincunx 12000 120 1 1 58.82
Triens 9600 96 0 32 264.85
Quadrans 7200 72 0 24 198.64
Sextans 4800 48 0 16 132.43
Uncia 2400 24 0 8 66.21

Note, Actus major was 14,400 square feet, equal to a femis; clima, 3600 square feet, equal to fescuncia; and actus minimus equal to a sextans.