  A fourth Part of the Architectonical Design, painted on the Vault of S. Ignatius’s Church; with its Lights and Shadows. In this Figure you have a Quarter of the whole Work, drawn from the foregoing Figure, after the usual Manner; namely, by taking with the Compasses the perpendicular Lines from the Angles of the Plan; and the parallel Lines from those of the Elevation, as also the visual Lines to the Point of Sight. |
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