. Model drawing and shading from casts; a complete guide to the elementary and advanced examinations in these subjects; . the fact that the right and left eye are conveying eachits separate and different impression, and that the ideain the mind is formed by a combination of all thesedifferent pictures, it will be acknowledged that the actof seeing is very largely a mental process, and that itis a task of some difficulty to analyze any one of theseseveral pictures, which is, nevertheless, what has to bedone before we can know what we have to draw. Let us try to understand what happens when we s
. Model drawing and shading from casts; a complete guide to the elementary and advanced examinations in these subjects; . the fact that the right and left eye are conveying eachits separate and different impression, and that the ideain the mind is formed by a combination of all thesedifferent pictures, it will be acknowledged that the actof seeing is very largely a mental process, and that itis a task of some difficulty to analyze any one of theseseveral pictures, which is, nevertheless, what has to bedone before we can know what we have to draw. Let us try to understand what happens when we seeanything. Make a small circular hole about J- inchin diameter in a piece of card or stout paper ; hold this 8 MODEL DEAWING AND SHADING FKOM CASTS. quite close to one eye, closing the other. You willfind that through this small hole you can see sTery-thing that youcould see froperly if the card wereremoved. Now hold the card only a little further fromyour eye, and you will find that you can see nothingbut the card itself. This experiment will prove three things. First, it proves that the rays of light by which the. Fig. 3. things looked at become visible must come to one pointin the eye of the spectator, and that when your peep-hole was held in its first position, you were includingin that little circle the whole bundle of rays needed toform the picture. Second, it proves that you cannot possibly draw themodels the same size as you see them, and that what THE ACT OF SEEING. » you thought you knew about their size must be theresult of past experience. Third, it will prove the limitation of vision; foralthough, when looking in the ordinary way, you mayfancy that you see more than you could when lookingthrough the peephole, this is not really the case; youare conscious of the presence of objects outside thiscircle, but if you had to describe them accurately youwould have to turn your eyes to see them although FiQ. 4. „ ,--
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherlondonchapmanandha
