Besides Vignola, Palladio and Scamozzi have also written excellently well of the Orders of Architecture; and each of ’em have deservedly their Followers and Admirers. That you might therefore be enabl’d to make Designs in Perspective, after the Proportions of the most celebrated Masters, I have in this Plate given you the Measures of all the Orders, as deliver’d by them in their Books.
Fig. liii. b.
Fig. Quinquages. tertia B.
Modus triplex delineandi columnas spirales.
Columnæ figuræ superioris carent ea concinnitate, qua præditæ sunt columnæ spirales æneæ celeberrimi Equitis Bernini ad sepulcrum S. Petri in Vaticano. Itaque methodum triplicem exhibeo ad minuenda spatia totius altitudinis columnæ.
1. Recta OA sit æqualis altitudini AB columnæ. Fiat autem recta OB, & arcus AP ex centro O, divisus in partes duodecim æquales, ducendo rectas, quæ per puncta divisionum desinant in columnam rectam; ac demum fiant parallelæ ad basim: Spatia inter has parallelas dabunt aperturam circini pro triangulis æquilateris & pro spiris, ut ostendit columna 1.