In Laos, 20ᵗʰ century, a unit of mass, = 3.75 grams. opens a new page containing a chart that shows relationships between this unit and other units in its system

The bak and the houn are the only two Laotian units of mass used both in ordinary trade and in the opium business. In ordinary trade, bak is a synonym for salung, and 1 bak = 2 fuang = 10 houn = ¼ bat. In the opium trade, however, 1 bak = 10 houn = ¹/₁₀ bia or hong.

United Nations, 1966.

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