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