...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」
...It is abundant in sulphur, iron, and manganese ores, and sulphuretof mercury: but rare in gypsum, chalk, calcareous and silicious earths...
Samuel D. Humphrey 「American Handbook of the Daguerrotype」
...These remarks even apply in a measure tonative products, such as coloured earths and metallic ores...
George Field 「Field's Chromatography」
...I engaged him a year ago—hisknowledge of ores is valuable...
Various 「Astounding Stories of Super-Science April 1930」
..."Anita, when you go back, tell Mikowe discussed radium ores...
Various 「Astounding Stories of Super-Science April 1930」
...The electric currents are as much a part of theearth as the ores and mountains they traverse...
Henry Warren 「Recreations in Astronomy」
...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」
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