...In some places it is obtained from what is called the specular iron ore, and also from black oxide... 
David Livingstone 「Missionary Travels and Researches in South Africa」
... The road led on this day over immense sheets of sandstone and iron ore...
Henry M. Stanley 「How I Found Livingstone」
...The Bakuss smelt copper from the ore and sell it very cheaply to thetraders for beads...
David Livingstone 「The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume II (of 2), 1869-1873」
...The Negro can work in wood and iron; and no one objects so long as heconfines his work to the felling of trees and sawing of boards, to thedigging of iron ore and making of pig iron...
Booker T. Washington 「The Future of the American Negro」
...The facts brought forward tosupport this view are: that no iron was smelted in Europe before 900 B...
Various 「The Journal of Negro History, Vol. I. Jan. 1916」
...The ore outcrops atvarious places and solid nodules or fragments are plentiful...
Gerard Fowke 「Archeological Investigations」
...” It was not intended that this order should alwayscontinue in force, but only until such time as the cause brought in thename of the foresters should be heard and determined...
H. G. Nicholls 「The Forest of Dean」
...These furnaces seem to have taken about 600 dozenbushels of ore at one time, during the delivery of which no second partywas allowed to come in...
H. G. Nicholls 「The Forest of Dean」
...The ore was carried down to thefurnaces on mules’ backs, from Edge Hill and other mines...
H. G. Nicholls 「The Forest of Dean」
...Its chief interest consists in the circumstance that it has been employedfrom very early times as a material for building; for though it contains avein of iron ore, little has been done in mining it...
H. G. Nicholls 「The Forest of Dean」
...The manufactories which were once at the mines of the Ephesians have nowbeen transferred to Rome, because this kind of ore was later discoveredin Spain...
Vitruvius 「Ten Books on Architecture」
...Metal, ore, earth, stone; root, plant, flower, fruit; beast,fish, insect—in turn aid the arduous task...
George Field 「Field's Chromatography」
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