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<p>Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.
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<br>Subjects: plane; horizontal; vertical; straight; projection; tangent; projections; surface; planes; point; straight lines; horizontal projection; tangent plane; vertical plane; vertical projection; vertical projections; conical surface; tangent planes; horizontal trace; horizontal projections</div>
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John Fry Heather ,  Gaspard Monge</div>
Internet Archive identifier