Flour is a substance, generally a powder, made by grinding raw grains or roots and used to make many different foods. Cereal flour is the main ingredient of bread ...
Cooking oil manufacture involves cleaning the seeds, grinding them, pressing, and extrading the oil from them. In extracting, a volatile hydrocarbon ...
5,500 B.C. Millstones used for grinding flour. The ability to sow and reap cereals may be one of the chief causes which led man to dwell in communities, rather than ...
China has been the source of many innovations, scientific discoveries and inventions. This includes the Four Great Inventions: papermaking, the compass, gunpowder ...