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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: velocity; center; body; weight; force; equal; bodies; gravity; rays; parallel; space described; common center; specific gravity; inclined plane; forces acting; convex lens; takes place; great number; velocity acquired; centrifugal force</div>
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Denison Olmsted</div>
Internet Archive identifier