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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 55

An illustration from 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, leaf 55
7^ :r :i^. U … _r; PERSPECTIVE. 45 when not represented precisely opposite to, andparallel with, the eye, will appear to convergetowards some remote point, i.e. their vanisliingpoint. Circles, when retiring in such manner,are represented by ellipses, proportioned totheir distances : their dimensions in…

Encyclopedias and dictionaries · Aeronautics

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