Mathematical institutions [Microform] : in three parts: I. clavis, key, II. janua, the gate, III. ancilla, hand-maid : to the mathematical sciences : wherein the doctrine of plain and spherical triangles is succinctly handled, geometrically demonstrated, arithmetically, geometrically, instrumentally performed and practically apply'd to geometry, cosmography, geography, astronomy, sciographia, navigation, and theories of the planets / by Philom
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