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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: angle; latitude; triangle; altitude; distance; declination; angles; spherical; equal; meridian; hour angle; middle latitude; spherical triangle; second member; triangle equal; meridian altitude; included angle; horizontal parallax; ship sails; three sides</div>
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Benjamin Peirce</div>
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