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ECONOMIC GEOLOGY
Science Lib.
TN 260 P13
"THE EARTH IS A GREAT STOREHOUSE OF WEALTH; BUT IT REQUIRES KNOWLEDGE WHERE TO SEARCH, AND SKILL HOW TO SECURE IT."
"THERE IS NOTHING SUPERFLUOUS IN NATURE; NOTHING USELESS, IF MAN ONLY KNEW HOW TO TURN IT TO HIS ADVANTAGE."
Science Lib. TN 260 P13