102 [App. I. PRACTICE AND OBSERVATIONS into a given number of irregularly unequal parts ; it is required to divide any other line, c D, into an equal number of parts, bearing to each other the same propor¬ tions as the parts of ab, and arranged in the same order. B … Draw the two lines parallel to each other, as in the figure. Join AC and bd, and produce the lines ac, bd, till they meet in p. Join a p, h p, c r, cutting c d in f g, h. Then the line CD is divided as required, in/, g, h. In the figure the lines A b and c D are accidentally per¬ pendicular to A p.…
Perspective
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