Mining American

Mining American

4.11 - 1251 ratings - Source

I found it generally stated in the books that residual clays were nonplastic and sedimentary clays were more or less plastic. ... One of my early experiments was to treat kaolin with a solution of tannin, and I at once noticed less water was needed to ... Tests were made on the increased tensilea#39; strength of clay as the result of treatment with organic matter, and it was found ... and only one instance could I find, that of the Egyptians in brick-making, as recorded in the fifth chapter of Exodus.

Title:Mining American
Publisher: - 1912

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