The National Geographic Magazine, Volume 100National Geographic Society, 1951 - Geography |
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Page 635
Rockhounds " Uncover Earth's Mineral Beauty 635 > assembled on the Mojave Desert near Hoover rock , or magma , from which ... I know types of ore deposits . of one collector who labored for three weeks Minerals formed by fusion have ...
Rockhounds " Uncover Earth's Mineral Beauty 635 > assembled on the Mojave Desert near Hoover rock , or magma , from which ... I know types of ore deposits . of one collector who labored for three weeks Minerals formed by fusion have ...
Page 641
Rockhounds " Uncover Earth's Mineral Beauty 641 a > collection contained all but 12 of the names saying that the mineral ... off visible light , man who collected minerals as a hobby , the causing the specimens to glow like hot coals .
Rockhounds " Uncover Earth's Mineral Beauty 641 a > collection contained all but 12 of the names saying that the mineral ... off visible light , man who collected minerals as a hobby , the causing the specimens to glow like hot coals .
Page 644
Deposits on the Malay Peninsula are mineral is unique among ores because the the world's richest . * processing of it yields nearly one - third more Quartz , oxide of silicon , is the second most borax simply by adding water .
Deposits on the Malay Peninsula are mineral is unique among ores because the the world's richest . * processing of it yields nearly one - third more Quartz , oxide of silicon , is the second most borax simply by adding water .
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Contents
Around the World in Eighty Days By Newman Bumstead With 34 illustrations | 9 |
Colorados Friendly Topland Rocky Mountains By Robert M Ormes With 19 illus | 11 |
Biggest Little Library in the World By Joseph T Foster 411 | 11 |
Copyright | |
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