FINENESS OF GRINDING
The fineness of grinding was regulated by the straight wooden beams attached on one side to the keel. By lifting the upper part of the wood, the beams are lifted or lowered, together with the keel or the upper millstone, thereby regulating the rougher or finer grinding.
The grain and the flour were weighed in the units called oke by using a scale. One oka is equivalent to 1,282 kg, with a volume of 1.5 liters. A miller was paid one ušur for grinding 100 kg of grain, which, at the end of the 19th Century was worth one Crown or the equivalent of 3-4 kg per 100 kg ground grain.