Freedman's Bureau Act: To coordinate efforts to protect the rights of former slaves and provide them with education and medical care, Congress creates the Freedmen's Bureau. One of the bureau's most important functions is to oversee labor contracts between ex-slaves and employers
I believe it’s the constitution
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Ancient China
Earthenware, stoneware, and bronze were materials commonly used in the Ancient China. This articles made from clay are also called Pottery. They began to use pots as articles where they could cook and eat their food. Stoneware's clay is fired at high temperatures of 1,200°C. Earthenware is fired at temperatures of 1,000 to 1,150 degrees. Which results in a more long lasting material, with a denser, stone-like quality.