Perspective and geometrical drawing : adapted to the use of candidates for second and third-class teachers' certificates (1887)
McGuirl, Thos. H. (Thomas H.) · Toronto, Ont. : W. Briggs · leaf 13
ways bounds our vision. If we look out upon a large lake we find that the sky andwater appear to meet; this line of apparent union is called2 10 DRAWING. the horizon. Xo matter how large an object is, if it recedesfar enough from us on a lake, it would at length appearon the horizon as a point. If… … Xow, if we take this point as a centre, and join it with theeye of the observer, and draw lines at an angle of 30° with itfrom the observers eye, we shall form a hollow cone, whichrepresents his range of vision : thus, if the observers eye beat the point X, and AB represent the horizon, and C…
Geometrical drawing · Perspective
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