THE TRUE IMPRESSIONISM
been affixed at top and bottom a pair of divergent wings extending upward and downward away from the centre. To No. 2 the same wings have been affixed,
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| No. 1. | No. 2. |
but their direction has been reversed so that they extend toward the centre of the diagram instead of away from it. Now no amount of didactic statement will convince the human eye that those two central lines are of the same length.
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