Dictionary of Greek and Roman antiquities. Ed. by William Smith. Illustrated by numerous engravings on wood.

T:B Z,3LE V:
ROMAN MEASURES OF SURFACE.
ORDINARY LAND MEASURES.: Square Feet. Acres. Roods. Perches. Square Feet.
PES QUADRATUS -94245,9445
100 Scrupulum, or Decempeda Quadrata * - 94'245,,,,, 94'245
480 4i ACTUS SIMPLEX -. 452'377,,, 1 80127
2400 24 5 UNCIA t || 2261'89,,,, 8 83'885
3600 36 71 1g I[Clima - - 339283,,, 12 125i83
14,400 144 30 6 4 ACTUS QUADRATUS Q- 13,571'318,, 1 9 231-07 Z
28,800 288 60 12 8 2 JUGERUT7 -. 27,142-636,, 2 19 189'89+
57,600 576 120 24 16 4 2 |Heredium 54,285'272 1 0 39 107o53~ c
5,760,000 57,600 12,000 2400 ~1600 400 200 100 Centuria -.5,428,527'2 124 2 19 135'25.6
123,040,000 230,400 48,000 9600 6400 1600 800 400 4 Saltus 21,14,108-8 491 1 37 268'7511
* This was the square of the standard 10-foot measuring-rod.
t The As to which this Uncia and the above Scr.tpulum belong is the Jegerum. The other uncial divisions of the Jugerum may easily be calculated from the
Uncin. The Semissis is, of course, the Actus Quadratus.
+ i. e. almost 5-8ths of an acre. ~ i. e almost an acre and a quarter. i. e. almost 500 acres,