Gold mining (19th century)

Gold mining (19th century)

The California Gold Rush started in 1848, near San Francisco.

تاريخ

کلیدواژه‌ها

gold mining, gold, mining, gold panner, gold ore, Gold rush, precious metal, rock, North America, San Francisco, آمریکا, ایالات متحده آمریکا, fortune, California, jewellery, modern history, greedy, economy, history, river

موارد مربوط

نماها

موارد مربوط

Mining at the time of the Industrial Revolution

At the end of the 18th century, mining boomed because of the great need for raw materials in the dynamically developing industry.

Watt´s steam engine (18th century)

The steam engine, perfected by the Scottish engineer James Watt, revolutionised technology.

موشک استفنسون (۱۸۲۹)

لوكوموتيو مهندس انگليسي، جورج استفنسون برای مسابقه لوکوموتیوها در سال ۱۸۲۹ ساخته شد۔

فلزها

اتم های فلزی ساختار شبکه ای منظم را تشکیل می دهند۔

Open-cast mine

As opposed to underground mines, in open-pit mines the layers covering coal are removed, coal is extracted on the surface.

Torsion balances

A force can be measured by measuring the twisting of the torsion wire in a torsion balance.

Ferrous metallurgy (intermediate)

Raw iron is produced from iron ore in iron smelters.

Ferrous metallurgy (basic)

Raw iron is produced from iron ore in iron smelters.

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