Essential materials from probability theory

Essential materials from probability theory 11.2.1 The law of large numbers... 

The next step away from the traditions of antiquity involved the addition of a third principle to Jabir s sulphur and mercury salt. Whereas the first two were components of metals, salt was considered an essential ingredient of living bodies. In this way alchemical theory became more than a theory of metallurgy and embraced all the material world. The three-principle theory is generally attributed to the Swiss alchemist Paracelsus (1493-1541), although it is probably older. Paracelsus asserted that sulphur, salt, and mercury form everything that lies in the four elements . 

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