A Dictionary of science, literature, and art [electronic resource]: comprising the history, description, and scientific principles of every branch of human knowledge; with the derivation and definition of all the terms in general use (1844)
Brande, William Thomas, 1788-1866, Cauvin, Joseph · New York : Harper & brothers · leaf 930
true appearance of an objecton a plane surface, it becomes necessary to know the lawsaccording to which the apparent linear dimensions of an ob-ject increase or decrease; and they are these generally: 1.The visual angle, or the apparent magnitude of a line, willbe less the greater the distance, and… … of the spectator he at I, and let E F G H be the plane onwhich the appearance of objects is observed. This is calledthe perspective plane, or plane of the picture. Now the ap-pearance of every object to be delineated will vary accordsing to the plane in which it stands, considered with respectto…
Humanities · Medicine · Science · Literature · Arts · Encyclopedias and dictionaries
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