A London encyclopaedia, or universal dictionary of science, art, literature and practical mechanics : comprising a popular view of the present state of knowledge : illustrated by numerous engravings, a general atlas, and appropriate diagrams (1829)
Curtis, Thomas, fl. 1820 · London : Thomas Tegg · leaf 799
ward. Pentagon, in geometry, is a figure of fivesides and five angles. See Geometry. Pentagon, in fortification, denotes a fort withfive bastions. PENTAGONOTIIECA, in botany, the namegiven by \aillant to the plant called by Linnaeus,Plumier, Houston, and others, pisonia. PENTAGRAPH, an instrument… … PEN r.6i PEN consists of four brass or wooden rulers, two ofthem from fifteen to eighteen inches long, theother two half that length. At the ends, and in themiddle, of the longer rulers, as also at the endsof the shorter, are holes, upon the exact fixing ofwhich the perfection of the instrument…
Encyclopedias and dictionaries · Aeronautics
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