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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 ...
An abacus (pl. abaci or abacuses), also called a counting frame, is a hand-operated calculating tool which was used from ancient times in the ancient Near East, Europe, China, and Russia, until the adoption of the Hindu–Arabic numeral system. [1] An abacus consists of a two-dimensional array of slidable beads (or similar objects). In their ...
The book describes methods of doing calculations without aid of an abacus, and as Ore (1948) confirms, for centuries after its publication the algorismists (followers of the style of calculation demonstrated in Liber Abaci) remained in conflict with the abacists (traditionalists who continued to use the abacus in conjunction with Roman numerals).
The original meaning was similar to "the game is afoot", but its modern meaning, like that of the phrase "crossing the Rubicon", denotes passing the point of no return on a momentous decision and entering into a risky endeavor where the outcome is left to chance. alenda lux ubi orta libertas: Let light be nourished where liberty has arisen
In classical architecture, the shape of the abacus and its edge profile varies in the different classical orders. In the Greek Doric order, the abacus is a plain square slab without mouldings, supported on an echinus. [2] In the Roman and Renaissance Doric orders, it is crowned by a moulding (known as "crown moulding").
Bronze strigil (Roman, 1st century AD, Walters Art Museum The strigil (Latin: strigilis) or stlengis (Ancient Greek: στλεγγίς, probably a loanword from the Pre-Greek substrate) is a tool for the cleansing of the body by scraping off dirt, perspiration, and oil that was applied before bathing in Ancient Greek and Roman cultures.
Ancient Roman decorative mosaic panels and floor mosaics were also produced during the 2nd century BC, particularly at sites such as Pompeii. Marble or limestone were cut into small cubes and arranged into representational designs and geometric patterns. Later, tesserae were made from colored glass, or clear glass backed with metal foils.
The hand appears to have had ritual significance and may have been affixed to a sceptre (as the one carried by Sabazios on the Philippopolis slab). Although there are many variations, the hand of Sabazios is typically depicted with a pinecone on the thumb and with a serpent or pair of serpents encircling the wrist and surmounting the bent ring ...