Brinton, Willard Cope, 1880- · New York, The Engineering magazine company · leaf 376
359 A FEW CAUTIONS is caused chiefly by the perspective hnes of the drawing which force one to estimate relative height to a certain extent by the number of perspective hnes intersected instead of by the actual size of the black pictures. … % .w^ 'mm. ard. Whenever Courtesy of the Grolier Society possible it is well Fig- 255. An Optical to have the chart Illusion checked by some The columns appear bent The •^ left-hand pair seem closest person other than ?t the ends, while the right hand pair seem closest at the one who drew the…
Graphic methods · Statistics
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