..., Portland, Ore... 
Various 「Astounding Stories, August, 1931」
...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」
...In the bed of the river,near the sea, is a mine of silver; the ore is in verysmall particles, like lead-coloured sand, intermixedwith mud...
Abd Salam Shabeeny 「An Account of Timbuctoo and Housa Territories in the Interior of Africa」
...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」
...With his simple bellows and a charcoalfire he reduced the ore that is found in many parts of the continentand forged implements of great usefulness and beauty...
W.E.B. Du Bois 「The Negro」
...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」
...Its flight is rapid, and the colour of the plumage so brilliant, thathe can compare it to nothing less dazzlingly bright than the richestfeathers of the peacock, or a newly dug specimen of copper ore...
Rev. C. A. Johns 「British Birds in their Haunts」
...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」
...This same Court decided that “the Winchester bushell, three ofwhich were to make a barrell,” should be the constant measure for“iron ore and coale,” 4d...
H. G. Nicholls 「The Forest of Dean」
...Lastly, six“barganers” were to fix the price at which iron ore should besold or carried to the different works...
H. G. Nicholls 「The Forest of Dean」
...This limestone iscalled the ‘crease,’ and is frequently found enveloped andcovered with the iron ore...
H. G. Nicholls 「The Forest of Dean」
...First, beforegetting to the vermilion itself by methods of treatment, they dig outwhat is called the clod, an ore like iron, but rather of a reddishcolour and covered with a red dust...
Vitruvius 「Ten Books on Architecture」
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