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<p>Book digitized by Google from the library of the University of California and uploaded to the Internet Archive by user tpb.
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<br>Subjects: water; heat; air; bacteria; food; plants; light; substances; starch; large; carbon dioxide; coloring matter; running water; ground water; north pole; small amount; fresh air; chemical action; boiling water; mineral matter</div>
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Bertha May Clark</div>
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