vigesimal

Updated: May 25, 2025

Possibly a numeration limited to the first three, four, or five numbers is the effect of intellectual inferiority. It is certainly a cause that continues it. As a measure of ethnological affinity it is unimportant. In America we have, within a limited range of languages, vigesimal systems like the Mexican, and systems limited to the three first units like the Caribb.

John MacGillivray - Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. : Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 2

The difference between a vigesimal and decimal system arises simply from the practice of counting by the fingers and toes collectively, or the fingers alone, being prevalent; whereas the decimal system as opposed to the quinary is referrible to the numeration being extended to both hands, instead of limited to one.

John MacGillivray - Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. : Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 2

So again, "when we speak of three-score and ten, we are counting by the vigesimal system, each score thus ideally made, standing for 20 for 'one man' as a Mexican or Carib would put it." 'Royal Institution of Great Britain, March 15, 1867. So it is with the art of writing, for letters are rudiments of pictorial representations. It is hardly possible to read Mr. 'Primitive Marriage, 1865.

Charles Darwin - The Descent of Man