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Diggers in the Earth

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Published: 1916
Language: English
Wordcount: 27,104 / 80 pg
Flesch-Kincaid Reading Ease: 83.7
LoC Categories: PE, TN
Downloads: 951
Added to site: 2008.03.06
mnybks.net#: 20236
Origin: gutenberg.org

Did you ever wonder how beds of coal happened to be in the earth? This is their story.

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ently been split off. I picked up a piece of the rock and examined it closely. It proved to be made up of three kinds of material. First, there were tiny sparkling bits of mica. In some places there are mica mines yielding big sheets of this curious mineral which is used in the doors of stoves and the little windows of automobile curtains. With the point of a knife the bits in my piece of granite could be split into tiny sheets as thin as paper. The second material was quartz. This was grayish-white and looked somewhat like glass. The third material was feldspar. This, too, was whitish, but one or two sides of each bit were flat, as if they had not been broken, but split. This is the most common kind of granite. There are many varieties. Some of them are almost white, some dark gray, others pale pink, and yet others deep red. It is found in more than half the States of the Union.

This quarry had been given up and allowed to fill with water; but it was a granite country, and farther down the road there

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