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Ancient Roman units of length Roman unit English name Equal to Metric equivalent Imperial equivalent Notes digitus: finger: 1 ⁄ 16 pes 18.5 mm 0.728 in 0.0607 ft uncia pollex inch thumb 1 ⁄ 12 pes 24.6 mm 0.971 in 0.0809 ft palmus (minor) palm 1 ⁄ 4 pes 74 mm 0.243 ft palmus maior: palm length (lit."greater palm") 3 ⁄ 4 pes 222 mm
The uncia (plural: unciae, lit. "a twelfth") was a Roman unit of length, weight, and volume.It survived as the Byzantine liquid ounce (Ancient Greek: οὐγγία, oungía) and the origin of the English inch, ounce, and fluid ounce.
A partially disassembled Curta calculator, showing the digit slides and the stepped drum behind them Curta Type I calculator, top view Curta Type I calculator, bottom view. The Curta is a hand-held mechanical calculator designed by Curt Herzstark. [1] It is known for its extremely compact design: a small cylinder that fits in the palm of the hand.
[39] [40] His son Commodus, who had been co-emperor since AD 177, assumed full imperial power, which is generally associated with the beginning of the decline of the Western Roman Empire. Rome's population was only a fraction of its peak when the Aurelian Wall was completed in AD 273 (in that year its population was only around 500,000).
Rome (Italian and Latin: Roma, pronounced ⓘ) is the capital city of Italy. It is also the capital of the Lazio region, the centre of the Metropolitan City of Rome Capital, and a special comune (municipality) named Comune di Roma Capitale.
The longer slot with five beads below the Ө position allowed for the counting of 1/12 of a whole unit called an uncia (from which the English words inch and ounce are derived), making the abacus useful for Roman measures and Roman currency. The first column was either a single slot with 4 beads or 3 slots with one, one and two beads ...
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Coin of Pescennius Niger, a Roman usurper who claimed imperial power AD 193–194. Legend: IMP CAES C PESC NIGER IVST AVG. While the imperial government of the Roman Empire was rarely called into question during its five centuries in the west and fifteen centuries in the east, individual emperors often faced unending challenges in the form of usurpation and perpetual civil wars. [30]