The point of a monument: A history of the aluminum cap of the Washington Monument

Πολύτιμα μέταλλα

thumb|[[Σβόλος χρυσού]] thumb|Συλλογή πολύτιμων μετάλλων Με τον συλλογικό όρο πολύτιμα μέταλλα αναφέρονται μεταλλικά χημικά στοιχεία που βρίσκονται στη φύση, είναι σχετικώ…

Metal precioso

Se suelen denominar metales preciosos aquellos metales que se encuentran en estado libre en la naturaleza, es decir, que no se encuentran combinados con otros elementos…

Metal precioso

Um metal precioso é um elemento químico metálico raro, de elevado valor econômico.

Metal prețios

Un metal prețios este un element chimic metalic rar de mare valoare economică. Noțiunea de metal prețios este relativă în raport cu epocile și civilizațiile, cât și în…

فرایند هال–هرولت

ويليام فريشموث

تاريخ الألومنيوم

アルミニウムの歴史

William Frishmuth

William Frishmuth (April 22, 1830–August 1, 1893) was a German-born American architect and metallurgist.

History of aluminium

The history of aluminium has been shaped by usage of alum. First written record of alums, made by Greek historian Herodotus, dates back to the 5th century BCE.

ホール・エルー法

Electric Smelting and Aluminum Company

The Electric Smelting and Aluminum Company, founded as Cowles Electric Smelting and Aluminum Company, and Cowles Syndicate Company, Limited formed in the United States…

Washington Monument

Given the 1884 height, a set of lightning rods installed in 1934 around the aluminum apex, which protrude above its tip by another, are not included in these heights.

Precious metal

The best-known precious metals are the coinage metals, gold and silver. Although both have industrial uses, they are better known for their uses in art, jewellery and…

Hall–Héroult process

The Hall–Héroult process is the major industrial process for smelting aluminium. It involves dissolving aluminium oxide (alumina) in molten cryolite, and electrolysing…