112 PRACTICE AND OBSERVATIONS [App. I. D … Fig. 59. We may now proceed to an architectural example. Let ah, Fig. 60., be the vertical profile of the capital of a pillar, A b the semi-diameter of its head or abacus, and F d the semi-diameter of its shaft. Let the shaft be circular, and the abacus square, down to the level e. Join b d, e f,…
Perspective
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