...It seems not unlikelythat the people who made the marvelous discovery of reducingiron ores by smelting were the African Negroes... 
W.E.B. Du Bois 「The Negro」
...It treats of the various materials and theirproduction, ores, alloys, commercial forms, etc...
Albert F. Siepert 「Bird Houses Boys Can Build」
...SterryHunt asserted "that the presence of iron ores, not less than that ofgraphite, points to the existence of organic life even during theLaurentian or so-called Azoic period...
Alpheus Spring Packard 「Our Common Insects」
...The leaner ores contain a great deal ofcalcareous matter in the shape of common limestone or spar, which reducesthe percentage in the ore as low as between 15 and 25 per cent...
H. G. Nicholls 「The Forest of Dean」
...Suppose you let mehave a talk with Prince? I have someknowledge of radium ores...
Various 「Astounding Stories of Super-Science April 1930」
...Their great bodies glowed orange-colored with the reflected heat of theblasts of flame used to melt the metals from their ores...
Charles Willard Diffin 「Two Thousand Miles Below」
...Somethingmust have been known of the properties of metals, and the art ofextracting them from their ores must have been practised, from the timethat coins and medals were first stamped...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
...Along the roads eight hundred teams, each consisting of eight bullocks,passed constantly to and fro, whilst scores of ships were employed inconveying the ore to England...
Alexander Sutherland 「History of Australia and New Zealand」
...Hence largefresh water rivers, valuable ores, and quarries of limestone,chalk, and marble, were daily proclaimed soon after we hadlanded...
Watkin Tench 「A Complete Account of the Settlement at Port Jackson」
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