Excerpt from Underground Treasures: How and Where to Find Them; A Key for the Ready Determination of All the Useful Minerals Within the United States
The object of this work is to point out those distinctions so clearly and in popular language that those who do not claim to be scientific may determine specimens for themselves; in other words, to furnish a key for the ready detemuz'izatz'o/z of all t/ze useful 77: z'uerals wz'tk in Me U 72 z'tea' States.
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