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Concentration of Mesothorium-I by Duckweed (Lemna)


IT is characteristic of the waters of the earth's crust—among which we can distinguish more than 550 different mineralogical species—that all these chemically different water-solutions constitute theoretically one and the same natural body—a unique great water-equilibrium of the earth's crust1. They are in constant close material connexion. This connexion is produced by two physical equilibrium systems common to all natural water-solutions:

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  1. Vernadsky, W. I., “History of Natural Waters” (in Russian), 1. (1933–36).

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  2. Vernadsky, W. I., ibic. 1, 11–12.

  3. Vernadsky, W. I., Priroda (in Russian), No. 8–9, 26 (1933).

  4. Vernadsky, W. I., Priroda (in Russian), No. 5, 414 (1932).

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VERNADSKY, W., BRUNOWSKY, B. & KUNASHEVA, C. Concentration of Mesothorium-I by Duckweed (Lemna). Nature 140, 317–318 (1937).

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