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Scale up of the tool

In the times of an Egyptian pyramid before 5000 years, a system of tools was established around saddle cuern. A complete process of powder comes out on the wall painting in Egypt. This is a powder process that supported Egyptian civilization. Astonishmently, the powder process of the present age are only mechanized using complex machines . Two process, grinding and separation process, in other words invention of the material refinement method were enabled to use seed of grass as food to resources for food of mankind. At the beginning, it began as one method to come through starvation, but development of the new tool system that it was necessary development of（sickle, hoe, flail , warehouse) was done by real search, sorting of useful grass which became edible it. Farming, the formation of a village by control of the peoples and production control was started. It was the very opening that it took several thousand years that social organization as a system change, which betted on a survivor of the human race.

Levermill

The people of the innumerable lower classes who supported the civilization were forced to increase of productive power. They were did not made to eat enormous laborer to make a pyramid by the small stone mill till that time.

Possible lines of evolution from the saddle stone to the mill stone was showed by Storck,j.,Teague,W.D."History of Milling"

The great leap came when the arclike motion of lever mill gave rise to a mill using full rotary motion. In Greek areas, the hourglass mill aparently proceded the quern;farther east the quern was reached by a single step,made before 700 B.C. The hand-powered quern proceded the water-powered millstone by at least three hundred years in the Mediterranean area;father east they may have come closer together.

The saddle quern which supported Egyptian civilization was a symbole from collection hunting to civilization.

Lever mill in use.

"The semicircular reproduction is from a fourth-century B.C. Megarian bowl, and shows a band of revelers disturbing operations in a bakery. "