In Central America, 20ᵗʰ century, a unit of length, literally, a “third.”

Costa Rica 27.866 centimeters (approximately 10.971 inches), a third of a vara. A synonym for the pie.

[Costa Rica. Ministerio de formento.]
Medidas y pesas del sistema métrico, y tablas de equivalencia con las antiguas.
San José de Costa Rica: Imprenta nacional, 1885.

United Nations, 1966, page 45.

El Salvador = 1 foot, 30.48 centimeters, a third of a yard. Also called a pie.

United Nations, 1966, page 49.

Guatemala and Nicaragua 28.0 centimeters (approximately 11 inches), a third of a vara. (UN, 1966)
Mexico 279.333 millimeters, a third of a vara.

Galván Riviera, 1844. Excerpt in Spanish with English translation.

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