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<p>Book digitized by Google from the library of the New York Public Library and uploaded to the Internet Archive by user tpb.
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<br>Subjects: center; velocity; body; equal; force; weight; gravity; bodies; rays; parallel; space described; common center; specific gravity; inclined plane; convex lens; forces acting; square roots; velocity acquired; takes place; great number</div>
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Denison Olmsted</div>
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