In their joint work Les oligoéléments (Trace Elements), Andrée Goudot and Didier Bertrand, member of the French Agricultural Academy, inform us: “In all the living organisms studied, in addition to carbon, oxygen, hydrogen, nitrogen, phosphorus, calcium, sulfur, chlorine, magnesium, potassium and sodium, the presence of the following elements can be considered to be a proved fact: six nonmetallic elements: fluorine, bromine, iodine, boron, arsenic and silicon; a transition element: vanadium; and thirteen metals: iron, zinc, manganese, copper, nickel, cobalt, lithium, rubidium, cesium, aluminium, titanium, chromium, molybdenum and also probably tin, lead, silver, gallium, strontium and barium.”
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