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<p>Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb.
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<br>Subjects: water; air; tube; magnetic; extremity; equal; pressure; needle; glass; fluid; north pole; takes place; specific gravity; carbonic acid; tin foil; brass meridian; south pole; prime conductor; advantage gained; glass tube</div>
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Thomas Turner Tate ,  C. S. Carter</div>
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