Faustino Malaguti

Faustino Malaguti, Joseph Durocher, and Sarzeaud were the first to prove the existence of silver in seawater by systematic scientific experiments. They took seawater samples from the coast of St. Malo to look for silver, and the results were compared by silver content of fucus of the same latitude. 
Fucus serratus is a seaweed of the north Atlantic Ocean

Faustino Giovita Mariano Malaguti ( Pragatto , 1802 - Rennes , 1878 ) was an Italian chemist. Exiled in France since riots of 1830-1831, he obtained a chair of chemistry at the Faculty of Sciences of Rennes in 1840 and founded the teaching of agricultural chemistry. In 1844, he collaborated with the Rennes geologist Joseph Marie Elisabeth Durocher on a long series of research on the distribution of silver in natural substances.

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Joseph Marie Élisabeth Durocher (31 May 1817, Rennes - 3 December 1860, Rennes) was a French geologist. In 1844 be became professor of geology and mineralogy at Rennes.

Faculty of Sciences of Rennes

Annales de chimie et de physique [3] 28, 129 (1850)

posted Jun 8, 2017, 6:45 AM by John Doe


posted Jun 8, 2017, 6:41 AM by John Doe

The French savans, MM. Malaguti, Derocher, and Sarzeaud, announce that they have detected in the waters of the ocean the presence of copper, lead, and silver. The water examined appears to have been taken some leagues off the coast of St. Malo, and the fucoidal plants of that district are also found to contain silver. The F. serratus and the F. ceramoides yielded ashes containing 1-100,000th, while the water of the sea contained but little more than 1-100,000,000th. They state also that they find silver in sea-salt, in ordinary muriatic acid, and in the soda of commerce; and that they have examined the rock-salt of Lorraine, in which also they discover this metal. Beyond this, pursuing their researches on terrestrial plants, they have obtained such indications as leave no doubt of the existence of silver in vegetable tissues. Lead is said to be always found in the ashes of marine plants, usually about an 18-100,000th part, and invariably a trace of copper. Should these results be confirmed by further examination, we shall have advanced considerably toward a knowledge of the phenomena of the formation of mineral veins.—Athenæum.

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