Barrel (unit) continued to use the same size barrels. In the worldwide oil industry, an oil barrel is defined as 42 US gallons, which is about litres or 35 imperial gallons. Oil companies that are listed on American stock exchanges typically report their production in terms of volume and use the units of bbl, Mbbl (one thousand barrels), or MMbbl (one million barrels) and occasionally for widest comprehensive statistics the Gbbl (or sometimes Gbl) denoting a billion. There is a conflict concerning the units for oil barrels (see ). For all other physical quantities, according to the International System of Units, the
Barrel of Monkeys principle be assembled in this way. The only unusual characteristic of the monkey is that its arms, legs, hands and feet are able to twist around each other to form many stable links. In this, they resemble protein molecules which can also link together in many ways. The resulting assemblies simulate biologically important structures, but their symmetry follows general geometric principles. The monkeys provide a 'hands on' approach to understanding these principles. "Barrel of Monkeys" is also called as Bandar Keela and is famous in south Asian countries. Barrel of Monkeys Barrel of Monkeys is a toy game released by