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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: forces; equal; gravity; velocity; parallel; resultant; force; point; plane; denoting; infinitely small; material point; accelerating force; forces applied; fixed point; parallel forces; three forces; middle point; centrifugal force; public domain</div>
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Isaac Wilber Jackson</div>
Internet Archive identifier