Masonry oven India, tandoors are traditional clay ovens, although these days modern electrically fired tandoors are available. The open-topped tandoor is a transitional design between the earth oven and the Roman-plan masonry oven. In the precolumbian Americas, similar ovens were often made of clay or adobe and are now referred to by the Spanish term "horno" (meaning "oven"). Horns are also traditional in the American Southwest. The traditional direct-fired masonry design is often called a "Roman" or "black" oven and dates in Western culture to at least the Roman Republic. It is known as a black oven because the fire generates soot
Allocation (oil and gas) in any allocation system, agree upon and establish a set of principles to follow. The principles states the units and measurement types used in allocations, i.e. where to account mass, volume, molar or energy balance. Since physical properties of hydrocarbons are constantly changing when hydrocarbons from various contributing sources are mixed, affected by heat transfer and transitions in pressure and temperature, owners of hydrocarbon in a commingled material cannot be allocated materials equal to what physically delivered from their well. For instance, two multiphase streams are commingled, one with oil of mole weight 107 and gas of 20 kg/kgmol, the