Alvaro Alonso Barba

Alvaro Alonso Barba was a secular Catholic priest and metallurgist born in Lepe in 1569.

Antonio (1786) says, "Baeticus ex oppido Lepe, apud Potosi"; hence Barba is assumed to be of Andalusian origin, from the ancient Roman province of Baetica.

He lived at Potosí during the period when its silver mines were most productive and luxury among the Spanish residents and mine owners had nearly reached its height. Father Barba divided his time between his priestly duties and a close study of the ores of this region and their treatment. There had been, since 1570, a complete revolution in the treatment of silver ores, through the application of mercury, and a number of improvements followed, of which Barba had knowledge.

In 1609, he invented the ''pan amalgamation'' process (in Spanish the ''cazo'' or ''fondo'' process) for extracting silver from ore by mixing it with salt and mercury and heating it in shallow copper vessels. In 1640 he published in Madrid a book entitled ''Arte de los Metales'', the earliest work on South American ores and minerals. It includes information on mineral localities in Bolivia. The book has been republished in Spanish, French, English and German. Provided by Wikipedia
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1
by Barba, Alvaro Alonso, 1569-
Ephrata, Gedruckt durch J. Georg Zeisiger anno, 1763

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2
by Barba, Alvaro Alonso, 1569-
Barcelona : Editorial Labor [para] Union Explosivos Rio Tinto, S.A., 1977

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3
by Barba, Alvaro Alonso, 1569-
Ephrata [Pennsylvania] : Gedruckt durch J. Georg Zeisiger, 1763

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4
by Barba, Alvaro Alonso, 1569-
London, Printed for J. Hodges, 1740
2d ed.

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5
by Barba, Alvaro Alonso, 1569-
New York : John Wiley & Sons, Inc., 1923

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6
by Barba, Alvaro Alonso, 1569-
En Madrid : En la imprenta del reyno, 1640

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7
by Barba, Alvaro Alonso, 1569-
Madrid : En la Imprenta del Reyno, 1640

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8
by Barba, Alvaro Alonso, 1569-
[Place of publication not identified] : [publisher not identified], 1674

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9
by Barba, Alvaro Alonso, 1569-
London : O. Payne, 1738

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10
by Barba, Alvaro Alonso, 1569-
[Place of publication not identified] : [publisher not identified], 1751

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11
by Barba, Alvaro Alonso, 1569-
London : Printed for S. Merne, 1670

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12
by Barba, Alvaro Alonso, 1569-
Lima : En la Imprenta de los Huérfanos., 1817

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13
by Barba, Alvaro Alonso, 1569-
[Place of publication not identified] : [publisher not identified], 1726

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14
by Barba, Alvaro Alonso, 1569-
Madrid : [Norwood, MA]: La oficina de la viuda de M. Fernandez, [Plimpton press], 1770; 1925

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15
by Barba, Alvaro Alonso, 1569-
London : Printed for J. Hodges, 1739

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16
by Barba, Alvaro Alonso, 1569-
London : Printed for S. Mearne ..., 1674

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17
by Barba, Alvaro Alonso, 1569-
London : Printed for S. Mearne, 1674

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18
by Barba, Alvaro Alonso, 1569-
London : Printed for S. Mearne ..., 1670

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19
by Barba, Alvaro Alonso, 1569-
Ephrata [Pa.]: : Gedruckt durch J. Georg Zeisiger, 1763

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20
by Barba, Alvaro Alonso, 1569-
London : printed for J. Hodges, 1740
The second edition.

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